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-rw-r--r--libs/dgl/src/nanovg/nanovg.c2475
1 files changed, 0 insertions, 2475 deletions
diff --git a/libs/dgl/src/nanovg/nanovg.c b/libs/dgl/src/nanovg/nanovg.c
deleted file mode 100644
index 0697c9b..0000000
--- a/libs/dgl/src/nanovg/nanovg.c
+++ /dev/null
@@ -1,2475 +0,0 @@
-//
-// Copyright (c) 2013 Mikko Mononen memon@inside.org
-//
-// This software is provided 'as-is', without any express or implied
-// warranty. In no event will the authors be held liable for any damages
-// arising from the use of this software.
-// Permission is granted to anyone to use this software for any purpose,
-// including commercial applications, and to alter it and redistribute it
-// freely, subject to the following restrictions:
-// 1. The origin of this software must not be misrepresented; you must not
-// claim that you wrote the original software. If you use this software
-// in a product, an acknowledgment in the product documentation would be
-// appreciated but is not required.
-// 2. Altered source versions must be plainly marked as such, and must not be
-// misrepresented as being the original software.
-// 3. This notice may not be removed or altered from any source distribution.
-//
-
-#include <stdio.h>
-#include <math.h>
-#include "nanovg.h"
-#define FONTSTASH_IMPLEMENTATION
-#include "fontstash.h"
-#include "stb_image.c"
-
-
-#define NVG_INIT_COMMANDS_SIZE 256
-#define NVG_INIT_POINTS_SIZE 128
-#define NVG_INIT_PATHS_SIZE 16
-#define NVG_INIT_VERTS_SIZE 256
-#define NVG_MAX_STATES 32
-
-#define NVG_KAPPA90 0.5522847493f // Lenght proportional to radius of a cubic bezier handle for 90deg arcs.
-
-#define NVG_COUNTOF(arr) (sizeof(arr) / sizeof(0[arr]))
-
-
-enum NVGcommands {
- NVG_MOVETO = 0,
- NVG_LINETO = 1,
- NVG_BEZIERTO = 2,
- NVG_CLOSE = 3,
- NVG_WINDING = 4,
-};
-
-enum NVGpointFlags
-{
- NVG_PT_CORNER = 0x01,
- NVG_PT_LEFT = 0x02,
- NVG_PT_BEVEL = 0x04,
- NVG_PR_INNERBEVEL = 0x08,
-};
-
-enum NVGexpandFeatures {
- NVG_FILL = 0x01,
- NVG_STROKE = 0x02,
- NVG_CAPS = 0x04,
-};
-
-struct NVGstate {
- struct NVGpaint fill;
- struct NVGpaint stroke;
- float strokeWidth;
- float miterLimit;
- int lineJoin;
- int lineCap;
- float xform[6];
- struct NVGscissor scissor;
- float fontSize;
- float letterSpacing;
- float lineHeight;
- float fontBlur;
- int textAlign;
- int fontId;
-};
-
-struct NVGpoint {
- float x,y;
- float dx, dy;
- float len;
- float dmx, dmy;
- unsigned char flags;
-};
-
-struct NVGpathCache {
- struct NVGpoint* points;
- int npoints;
- int cpoints;
- struct NVGpath* paths;
- int npaths;
- int cpaths;
- struct NVGvertex* verts;
- int nverts;
- int cverts;
- float bounds[4];
-};
-
-struct NVGcontext {
- struct NVGparams params;
- float* commands;
- int ccommands;
- int ncommands;
- float commandx, commandy;
- struct NVGstate states[NVG_MAX_STATES];
- int nstates;
- struct NVGpathCache* cache;
- float tessTol;
- float distTol;
- float fringeWidth;
- float devicePxRatio;
- struct FONScontext* fs;
- int fontImage;
- int alphaBlend;
- int drawCallCount;
- int fillTriCount;
- int strokeTriCount;
- int textTriCount;
-};
-
-static float nvg__sqrtf(float a) { return sqrtf(a); }
-static float nvg__modf(float a, float b) { return fmodf(a, b); }
-static float nvg__sinf(float a) { return sinf(a); }
-static float nvg__cosf(float a) { return cosf(a); }
-static float nvg__tanf(float a) { return tanf(a); }
-static float nvg__atan2f(float a,float b) { return atan2f(a, b); }
-static float nvg__acosf(float a) { return acosf(a); }
-
-static int nvg__mini(int a, int b) { return a < b ? a : b; }
-static int nvg__maxi(int a, int b) { return a > b ? a : b; }
-static int nvg__clampi(int a, int mn, int mx) { return a < mn ? mn : (a > mx ? mx : a); }
-static float nvg__minf(float a, float b) { return a < b ? a : b; }
-static float nvg__maxf(float a, float b) { return a > b ? a : b; }
-static float nvg__absf(float a) { return a >= 0.0f ? a : -a; }
-static float nvg__clampf(float a, float mn, float mx) { return a < mn ? mn : (a > mx ? mx : a); }
-static float nvg__cross(float dx0, float dy0, float dx1, float dy1) { return dx1*dy0 - dx0*dy1; }
-
-static float nvg__normalize(float *x, float* y)
-{
- float d = nvg__sqrtf((*x)*(*x) + (*y)*(*y));
- if (d > 1e-6f) {
- float id = 1.0f / d;
- *x *= id;
- *y *= id;
- }
- return d;
-}
-
-
-static void nvg__deletePathCache(struct NVGpathCache* c)
-{
- if (c == NULL) return;
- if (c->points != NULL) free(c->points);
- if (c->paths != NULL) free(c->paths);
- if (c->verts != NULL) free(c->verts);
- free(c);
-}
-
-static struct NVGpathCache* nvg__allocPathCache()
-{
- struct NVGpathCache* c = (struct NVGpathCache*)malloc(sizeof(struct NVGpathCache));
- if (c == NULL) goto error;
- memset(c, 0, sizeof(struct NVGpathCache));
-
- c->points = (struct NVGpoint*)malloc(sizeof(struct NVGpoint)*NVG_INIT_POINTS_SIZE);
- if (!c->points) goto error;
- c->npoints = 0;
- c->cpoints = NVG_INIT_POINTS_SIZE;
-
- c->paths = (struct NVGpath*)malloc(sizeof(struct NVGpath)*NVG_INIT_PATHS_SIZE);
- if (!c->paths) goto error;
- c->npaths = 0;
- c->cpaths = NVG_INIT_PATHS_SIZE;
-
- c->verts = (struct NVGvertex*)malloc(sizeof(struct NVGvertex)*NVG_INIT_VERTS_SIZE);
- if (!c->verts) goto error;
- c->nverts = 0;
- c->cverts = NVG_INIT_VERTS_SIZE;
-
- return c;
-error:
- nvg__deletePathCache(c);
- return NULL;
-}
-
-static void nvg__setDevicePixelRatio(struct NVGcontext* ctx, float ratio)
-{
- ctx->tessTol = 1.0f / ratio;
- ctx->distTol = 0.01f / ratio;
- ctx->fringeWidth = 1.0f / ratio;
- ctx->devicePxRatio = ratio;
-}
-
-struct NVGcontext* nvgCreateInternal(struct NVGparams* params)
-{
- struct FONSparams fontParams;
- struct NVGcontext* ctx = (struct NVGcontext*)malloc(sizeof(struct NVGcontext));
- if (ctx == NULL) goto error;
- memset(ctx, 0, sizeof(struct NVGcontext));
-
- ctx->params = *params;
-
- ctx->commands = (float*)malloc(sizeof(float)*NVG_INIT_COMMANDS_SIZE);
- if (!ctx->commands) goto error;
- ctx->ncommands = 0;
- ctx->ccommands = NVG_INIT_COMMANDS_SIZE;
-
- ctx->alphaBlend = NVG_STRAIGHT_ALPHA;
-
- ctx->cache = nvg__allocPathCache();
- if (ctx->cache == NULL) goto error;
-
- nvgSave(ctx);
- nvgReset(ctx);
-
- nvg__setDevicePixelRatio(ctx, 1.0f);
-
- if (ctx->params.renderCreate(ctx->params.userPtr) == 0) goto error;
-
- // Init font rendering
- memset(&fontParams, 0, sizeof(fontParams));
- fontParams.width = params->atlasWidth;
- fontParams.height = params->atlasHeight;
- fontParams.flags = FONS_ZERO_TOPLEFT;
- fontParams.renderCreate = NULL;
- fontParams.renderUpdate = NULL;
- fontParams.renderDraw = NULL;
- fontParams.renderDelete = NULL;
- fontParams.userPtr = NULL;
- ctx->fs = fonsCreateInternal(&fontParams);
- if (ctx->fs == NULL) goto error;
-
- // Create font texture
- ctx->fontImage = ctx->params.renderCreateTexture(ctx->params.userPtr, NVG_TEXTURE_ALPHA, fontParams.width, fontParams.height, NULL);
- if (ctx->fontImage == 0) goto error;
-
- return ctx;
-
-error:
- nvgDeleteInternal(ctx);
- return 0;
-}
-
-void nvgDeleteInternal(struct NVGcontext* ctx)
-{
- if (ctx == NULL) return;
- if (ctx->commands != NULL) free(ctx->commands);
- if (ctx->cache != NULL) nvg__deletePathCache(ctx->cache);
-
- if (ctx->fs)
- fonsDeleteInternal(ctx->fs);
-
- if (ctx->params.renderDelete != NULL)
- ctx->params.renderDelete(ctx->params.userPtr);
-
- free(ctx);
-}
-
-void nvgBeginFrame(struct NVGcontext* ctx, int windowWidth, int windowHeight, float devicePixelRatio, int alphaBlend)
-{
-/* printf("Tris: draws:%d fill:%d stroke:%d text:%d TOT:%d\n",
- ctx->drawCallCount, ctx->fillTriCount, ctx->strokeTriCount, ctx->textTriCount,
- ctx->fillTriCount+ctx->strokeTriCount+ctx->textTriCount);*/
-
- ctx->nstates = 0;
- nvgSave(ctx);
- nvgReset(ctx);
-
- nvg__setDevicePixelRatio(ctx, devicePixelRatio);
- ctx->alphaBlend = alphaBlend;
-
- ctx->params.renderViewport(ctx->params.userPtr, windowWidth, windowHeight, ctx->alphaBlend);
-
- ctx->drawCallCount = 0;
- ctx->fillTriCount = 0;
- ctx->strokeTriCount = 0;
- ctx->textTriCount = 0;
-}
-
-void nvgEndFrame(struct NVGcontext* ctx)
-{
- ctx->params.renderFlush(ctx->params.userPtr, ctx->alphaBlend);
-}
-
-struct NVGcolor nvgRGB(unsigned char r, unsigned char g, unsigned char b)
-{
- return nvgRGBA(r,g,b,255);
-}
-
-struct NVGcolor nvgRGBf(float r, float g, float b)
-{
- return nvgRGBAf(r,g,b,1.0f);
-}
-
-struct NVGcolor nvgRGBA(unsigned char r, unsigned char g, unsigned char b, unsigned char a)
-{
- struct NVGcolor color;
- // Use longer initialization to suppress warning.
- color.r = r / 255.0f;
- color.g = g / 255.0f;
- color.b = b / 255.0f;
- color.a = a / 255.0f;
- return color;
-}
-
-struct NVGcolor nvgRGBAf(float r, float g, float b, float a)
-{
- struct NVGcolor color;
- // Use longer initialization to suppress warning.
- color.r = r;
- color.g = g;
- color.b = b;
- color.a = a;
- return color;
-}
-
-struct NVGcolor nvgTransRGBA(struct NVGcolor c, unsigned char a)
-{
- c.a = a / 255.0f;
- return c;
-}
-
-struct NVGcolor nvgTransRGBAf(struct NVGcolor c, float a)
-{
- c.a = a;
- return c;
-}
-
-struct NVGcolor nvgLerpRGBA(struct NVGcolor c0, struct NVGcolor c1, float u)
-{
- int i;
- float oneminu;
- struct NVGcolor cint;
-
- u = nvg__clampf(u, 0.0f, 1.0f);
- oneminu = 1.0f - u;
- for( i = 0; i <4; ++i )
- {
- cint.rgba[i] = c0.rgba[i] * oneminu + c1.rgba[i] * u;
- }
-
- return cint;
-}
-
-struct NVGcolor nvgHSL(float h, float s, float l)
-{
- return nvgHSLA(h,s,l,255);
-}
-
-static float nvg__hue(float h, float m1, float m2)
-{
- if (h < 0) h += 1;
- if (h > 1) h -= 1;
- if (h < 1.0f/6.0f)
- return m1 + (m2 - m1) * h * 6.0f;
- else if (h < 3.0f/6.0f)
- return m2;
- else if (h < 4.0f/6.0f)
- return m1 + (m2 - m1) * (2.0f/3.0f - h) * 6.0f;
- return m1;
-}
-
-struct NVGcolor nvgHSLA(float h, float s, float l, unsigned char a)
-{
- float m1, m2;
- struct NVGcolor col;
- h = nvg__modf(h, 1.0f);
- if (h < 0.0f) h += 1.0f;
- s = nvg__clampf(s, 0.0f, 1.0f);
- l = nvg__clampf(l, 0.0f, 1.0f);
- m2 = l <= 0.5f ? (l * (1 + s)) : (l + s - l * s);
- m1 = 2 * l - m2;
- col.r = nvg__clampf(nvg__hue(h + 1.0f/3.0f, m1, m2), 0.0f, 1.0f);
- col.g = nvg__clampf(nvg__hue(h, m1, m2), 0.0f, 1.0f);
- col.b = nvg__clampf(nvg__hue(h - 1.0f/3.0f, m1, m2), 0.0f, 1.0f);
- col.a = a/255.0f;
- return col;
-}
-
-
-static struct NVGstate* nvg__getState(struct NVGcontext* ctx)
-{
- return &ctx->states[ctx->nstates-1];
-}
-
-void nvgTransformIdentity(float* t)
-{
- t[0] = 1.0f; t[1] = 0.0f;
- t[2] = 0.0f; t[3] = 1.0f;
- t[4] = 0.0f; t[5] = 0.0f;
-}
-
-void nvgTransformTranslate(float* t, float tx, float ty)
-{
- t[0] = 1.0f; t[1] = 0.0f;
- t[2] = 0.0f; t[3] = 1.0f;
- t[4] = tx; t[5] = ty;
-}
-
-void nvgTransformScale(float* t, float sx, float sy)
-{
- t[0] = sx; t[1] = 0.0f;
- t[2] = 0.0f; t[3] = sy;
- t[4] = 0.0f; t[5] = 0.0f;
-}
-
-void nvgTransformRotate(float* t, float a)
-{
- float cs = nvg__cosf(a), sn = nvg__sinf(a);
- t[0] = cs; t[1] = sn;
- t[2] = -sn; t[3] = cs;
- t[4] = 0.0f; t[5] = 0.0f;
-}
-
-void nvgTransformSkewX(float* t, float a)
-{
- t[0] = 1.0f; t[1] = 0.0f;
- t[2] = nvg__tanf(a); t[3] = 1.0f;
- t[4] = 0.0f; t[5] = 0.0f;
-}
-
-void nvgTransformSkewY(float* t, float a)
-{
- t[0] = 1.0f; t[1] = nvg__tanf(a);
- t[2] = 0.0f; t[3] = 1.0f;
- t[4] = 0.0f; t[5] = 0.0f;
-}
-
-void nvgTransformMultiply(float* t, const float* s)
-{
- float t0 = t[0] * s[0] + t[1] * s[2];
- float t2 = t[2] * s[0] + t[3] * s[2];
- float t4 = t[4] * s[0] + t[5] * s[2] + s[4];
- t[1] = t[0] * s[1] + t[1] * s[3];
- t[3] = t[2] * s[1] + t[3] * s[3];
- t[5] = t[4] * s[1] + t[5] * s[3] + s[5];
- t[0] = t0;
- t[2] = t2;
- t[4] = t4;
-}
-
-void nvgTransformPremultiply(float* t, const float* s)
-{
- float s2[6];
- memcpy(s2, s, sizeof(float)*6);
- nvgTransformMultiply(s2, t);
- memcpy(t, s2, sizeof(float)*6);
-}
-
-int nvgTransformInverse(float* inv, const float* t)
-{
- double invdet, det = (double)t[0] * t[3] - (double)t[2] * t[1];
- if (det > -1e-6 && det < 1e-6) {
- nvgTransformIdentity(inv);
- return 0;
- }
- invdet = 1.0 / det;
- inv[0] = (float)(t[3] * invdet);
- inv[2] = (float)(-t[2] * invdet);
- inv[4] = (float)(((double)t[2] * t[5] - (double)t[3] * t[4]) * invdet);
- inv[1] = (float)(-t[1] * invdet);
- inv[3] = (float)(t[0] * invdet);
- inv[5] = (float)(((double)t[1] * t[4] - (double)t[0] * t[5]) * invdet);
- return 1;
-}
-
-void nvgTransformPoint(float* dx, float* dy, const float* t, float sx, float sy)
-{
- *dx = sx*t[0] + sy*t[2] + t[4];
- *dy = sx*t[1] + sy*t[3] + t[5];
-}
-
-float nvgDegToRad(float deg)
-{
- return deg / 180.0f * NVG_PI;
-}
-
-float nvgRadToDeg(float rad)
-{
- return rad / NVG_PI * 180.0f;
-}
-
-static void nvg__setPaintColor(struct NVGpaint* p, struct NVGcolor color)
-{
- memset(p, 0, sizeof(*p));
- nvgTransformIdentity(p->xform);
- p->radius = 0.0f;
- p->feather = 1.0f;
- p->innerColor = color;
- p->outerColor = color;
-}
-
-
-// State handling
-void nvgSave(struct NVGcontext* ctx)
-{
- if (ctx->nstates >= NVG_MAX_STATES)
- return;
- if (ctx->nstates > 0)
- memcpy(&ctx->states[ctx->nstates], &ctx->states[ctx->nstates-1], sizeof(struct NVGstate));
- ctx->nstates++;
-}
-
-void nvgRestore(struct NVGcontext* ctx)
-{
- if (ctx->nstates <= 1)
- return;
- ctx->nstates--;
-}
-
-void nvgReset(struct NVGcontext* ctx)
-{
- struct NVGstate* state = nvg__getState(ctx);
- memset(state, 0, sizeof(*state));
-
- nvg__setPaintColor(&state->fill, nvgRGBA(255,255,255,255));
- nvg__setPaintColor(&state->stroke, nvgRGBA(0,0,0,255));
- state->strokeWidth = 1.0f;
- state->miterLimit = 10.0f;
- state->lineCap = NVG_BUTT;
- state->lineJoin = NVG_MITER;
- nvgTransformIdentity(state->xform);
-
- state->scissor.extent[0] = 0.0f;
- state->scissor.extent[1] = 0.0f;
-
- state->fontSize = 16.0f;
- state->letterSpacing = 0.0f;
- state->lineHeight = 0.0f;
- state->fontBlur = 0.0f;
- state->textAlign = NVG_ALIGN_LEFT | NVG_ALIGN_BASELINE;
- state->fontId = 0;
-}
-
-// State setting
-void nvgStrokeWidth(struct NVGcontext* ctx, float width)
-{
- struct NVGstate* state = nvg__getState(ctx);
- state->strokeWidth = width;
-}
-
-void nvgMiterLimit(struct NVGcontext* ctx, float limit)
-{
- struct NVGstate* state = nvg__getState(ctx);
- state->miterLimit = limit;
-}
-
-void nvgLineCap(struct NVGcontext* ctx, int cap)
-{
- struct NVGstate* state = nvg__getState(ctx);
- state->lineCap = cap;
-}
-
-void nvgLineJoin(struct NVGcontext* ctx, int join)
-{
- struct NVGstate* state = nvg__getState(ctx);
- state->lineJoin = join;
-}
-
-
-void nvgTransform(struct NVGcontext* ctx, float a, float b, float c, float d, float e, float f)
-{
- struct NVGstate* state = nvg__getState(ctx);
- float t[6] = { a, b, c, d, e, f };
- nvgTransformPremultiply(state->xform, t);
-}
-
-void nvgResetTransform(struct NVGcontext* ctx)
-{
- struct NVGstate* state = nvg__getState(ctx);
- nvgTransformIdentity(state->xform);
-}
-
-void nvgTranslate(struct NVGcontext* ctx, float x, float y)
-{
- struct NVGstate* state = nvg__getState(ctx);
- float t[6];
- nvgTransformTranslate(t, x,y);
- nvgTransformPremultiply(state->xform, t);
-}
-
-void nvgRotate(struct NVGcontext* ctx, float angle)
-{
- struct NVGstate* state = nvg__getState(ctx);
- float t[6];
- nvgTransformRotate(t, angle);
- nvgTransformPremultiply(state->xform, t);
-}
-
-void nvgSkewX(struct NVGcontext* ctx, float angle)
-{
- struct NVGstate* state = nvg__getState(ctx);
- float t[6];
- nvgTransformSkewX(t, angle);
- nvgTransformPremultiply(state->xform, t);
-}
-
-void nvgSkewY(struct NVGcontext* ctx, float angle)
-{
- struct NVGstate* state = nvg__getState(ctx);
- float t[6];
- nvgTransformSkewY(t, angle);
- nvgTransformPremultiply(state->xform, t);
-}
-
-void nvgScale(struct NVGcontext* ctx, float x, float y)
-{
- struct NVGstate* state = nvg__getState(ctx);
- float t[6];
- nvgTransformScale(t, x,y);
- nvgTransformPremultiply(state->xform, t);
-}
-
-void nvgCurrentTransform(struct NVGcontext* ctx, float* xform)
-{
- struct NVGstate* state = nvg__getState(ctx);
- if (xform == NULL) return;
- memcpy(xform, state->xform, sizeof(float)*6);
-}
-
-void nvgStrokeColor(struct NVGcontext* ctx, struct NVGcolor color)
-{
- struct NVGstate* state = nvg__getState(ctx);
- nvg__setPaintColor(&state->stroke, color);
-}
-
-void nvgStrokePaint(struct NVGcontext* ctx, struct NVGpaint paint)
-{
- struct NVGstate* state = nvg__getState(ctx);
- state->stroke = paint;
- nvgTransformMultiply(state->stroke.xform, state->xform);
-}
-
-void nvgFillColor(struct NVGcontext* ctx, struct NVGcolor color)
-{
- struct NVGstate* state = nvg__getState(ctx);
- nvg__setPaintColor(&state->fill, color);
-}
-
-void nvgFillPaint(struct NVGcontext* ctx, struct NVGpaint paint)
-{
- struct NVGstate* state = nvg__getState(ctx);
- state->fill = paint;
- nvgTransformMultiply(state->fill.xform, state->xform);
-}
-
-int nvgCreateImage(struct NVGcontext* ctx, const char* filename)
-{
- int w, h, n, image;
- unsigned char* img = stbi_load(filename, &w, &h, &n, 4);
- if (img == NULL) {
-// printf("Failed to load %s - %s\n", filename, stbi_failure_reason());
- return 0;
- }
- image = nvgCreateImageRGBA(ctx, w, h, img);
- stbi_image_free(img);
- return image;
-}
-
-int nvgCreateImageMem(struct NVGcontext* ctx, unsigned char* data, int ndata)
-{
- int w, h, n, image;
- unsigned char* img = stbi_load_from_memory(data, ndata, &w, &h, &n, 4);
- if (img == NULL) {
-// printf("Failed to load %s - %s\n", filename, stbi_failure_reason());
- return 0;
- }
- image = nvgCreateImageRGBA(ctx, w, h, img);
- stbi_image_free(img);
- return image;
-}
-
-int nvgCreateImageRGBA(struct NVGcontext* ctx, int w, int h, const unsigned char* data)
-{
- return ctx->params.renderCreateTexture(ctx->params.userPtr, NVG_TEXTURE_RGBA, w, h, data);
-}
-
-void nvgUpdateImage(struct NVGcontext* ctx, int image, const unsigned char* data)
-{
- int w, h;
- ctx->params.renderGetTextureSize(ctx->params.userPtr, image, &w, &h);
- ctx->params.renderUpdateTexture(ctx->params.userPtr, image, 0,0, w,h, data);
-}
-
-void nvgImageSize(struct NVGcontext* ctx, int image, int* w, int* h)
-{
- ctx->params.renderGetTextureSize(ctx->params.userPtr, image, w, h);
-}
-
-void nvgDeleteImage(struct NVGcontext* ctx, int image)
-{
- ctx->params.renderDeleteTexture(ctx->params.userPtr, image);
-}
-
-struct NVGpaint nvgLinearGradient(struct NVGcontext* ctx,
- float sx, float sy, float ex, float ey,
- struct NVGcolor icol, struct NVGcolor ocol)
-{
- struct NVGpaint p;
- float dx, dy, d;
- const float large = 1e5;
- NVG_NOTUSED(ctx);
- memset(&p, 0, sizeof(p));
-
- // Calculate transform aligned to the line
- dx = ex - sx;
- dy = ey - sy;
- d = sqrtf(dx*dx + dy*dy);
- if (d > 0.0001f) {
- dx /= d;
- dy /= d;
- } else {
- dx = 0;
- dy = 1;
- }
-
- p.xform[0] = dy; p.xform[1] = -dx;
- p.xform[2] = dx; p.xform[3] = dy;
- p.xform[4] = sx - dx*large; p.xform[5] = sy - dy*large;
-
- p.extent[0] = large;
- p.extent[1] = large + d*0.5f;
-
- p.radius = 0.0f;
-
- p.feather = nvg__maxf(1.0f, d);
-
- p.innerColor = icol;
- p.outerColor = ocol;
-
- return p;
-}
-
-struct NVGpaint nvgRadialGradient(struct NVGcontext* ctx,
- float cx, float cy, float inr, float outr,
- struct NVGcolor icol, struct NVGcolor ocol)
-{
- struct NVGpaint p;
- float r = (inr+outr)*0.5f;
- float f = (outr-inr);
- NVG_NOTUSED(ctx);
- memset(&p, 0, sizeof(p));
-
- nvgTransformIdentity(p.xform);
- p.xform[4] = cx;
- p.xform[5] = cy;
-
- p.extent[0] = r;
- p.extent[1] = r;
-
- p.radius = r;
-
- p.feather = nvg__maxf(1.0f, f);
-
- p.innerColor = icol;
- p.outerColor = ocol;
-
- return p;
-}
-
-struct NVGpaint nvgBoxGradient(struct NVGcontext* ctx,
- float x, float y, float w, float h, float r, float f,
- struct NVGcolor icol, struct NVGcolor ocol)
-{
- struct NVGpaint p;
- NVG_NOTUSED(ctx);
- memset(&p, 0, sizeof(p));
-
- nvgTransformIdentity(p.xform);
- p.xform[4] = x+w*0.5f;
- p.xform[5] = y+h*0.5f;
-
- p.extent[0] = w*0.5f;
- p.extent[1] = h*0.5f;
-
- p.radius = r;
-
- p.feather = nvg__maxf(1.0f, f);
-
- p.innerColor = icol;
- p.outerColor = ocol;
-
- return p;
-}
-
-
-struct NVGpaint nvgImagePattern(struct NVGcontext* ctx,
- float cx, float cy, float w, float h, float angle,
- int image, int repeat)
-{
- struct NVGpaint p;
- NVG_NOTUSED(ctx);
- memset(&p, 0, sizeof(p));
-
- nvgTransformRotate(p.xform, angle);
- p.xform[4] = cx;
- p.xform[5] = cy;
-
- p.extent[0] = w;
- p.extent[1] = h;
-
- p.image = image;
- p.repeat = repeat;
-
- return p;
-}
-
-// Scissoring
-void nvgScissor(struct NVGcontext* ctx, float x, float y, float w, float h)
-{
- struct NVGstate* state = nvg__getState(ctx);
-
- nvgTransformIdentity(state->scissor.xform);
- state->scissor.xform[4] = x+w*0.5f;
- state->scissor.xform[5] = y+h*0.5f;
- nvgTransformMultiply(state->scissor.xform, state->xform);
-
- state->scissor.extent[0] = w*0.5f;
- state->scissor.extent[1] = h*0.5f;
-}
-
-void nvgResetScissor(struct NVGcontext* ctx)
-{
- struct NVGstate* state = nvg__getState(ctx);
- memset(state->scissor.xform, 0, sizeof(state->scissor.xform));
- state->scissor.extent[0] = 0;
- state->scissor.extent[1] = 0;
-}
-
-static int nvg__ptEquals(float x1, float y1, float x2, float y2, float tol)
-{
- float dx = x2 - x1;
- float dy = y2 - y1;
- return dx*dx + dy*dy < tol*tol;
-}
-
-static float nvg__distPtSeg(float x, float y, float px, float py, float qx, float qy)
-{
- float pqx, pqy, dx, dy, d, t;
- pqx = qx-px;
- pqy = qy-py;
- dx = x-px;
- dy = y-py;
- d = pqx*pqx + pqy*pqy;
- t = pqx*dx + pqy*dy;
- if (d > 0) t /= d;
- if (t < 0) t = 0;
- else if (t > 1) t = 1;
- dx = px + t*pqx - x;
- dy = py + t*pqy - y;
- return dx*dx + dy*dy;
-}
-
-static void nvg__appendCommands(struct NVGcontext* ctx, float* vals, int nvals)
-{
- struct NVGstate* state = nvg__getState(ctx);
- int i;
-
- if (ctx->ncommands+nvals > ctx->ccommands) {
- float* commands;
- int ccommands = ctx->ncommands+nvals + ctx->ccommands/2;
- commands = (float*)realloc(ctx->commands, sizeof(float)*ccommands);
- if (commands == NULL) return;
- ctx->commands = commands;
- ctx->ccommands = ccommands;
- }
-
- // transform commands
- i = 0;
- while (i < nvals) {
- int cmd = (int)vals[i];
- switch (cmd) {
- case NVG_MOVETO:
- nvgTransformPoint(&vals[i+1],&vals[i+2], state->xform, vals[i+1],vals[i+2]);
- i += 3;
- break;
- case NVG_LINETO:
- nvgTransformPoint(&vals[i+1],&vals[i+2], state->xform, vals[i+1],vals[i+2]);
- i += 3;
- break;
- case NVG_BEZIERTO:
- nvgTransformPoint(&vals[i+1],&vals[i+2], state->xform, vals[i+1],vals[i+2]);
- nvgTransformPoint(&vals[i+3],&vals[i+4], state->xform, vals[i+3],vals[i+4]);
- nvgTransformPoint(&vals[i+5],&vals[i+6], state->xform, vals[i+5],vals[i+6]);
- i += 7;
- break;
- case NVG_CLOSE:
- i++;
- break;
- case NVG_WINDING:
- i += 2;
- break;
- default:
- i++;
- }
- }
-
- memcpy(&ctx->commands[ctx->ncommands], vals, nvals*sizeof(float));
-
- ctx->ncommands += nvals;
-
- if ((int)vals[0] != NVG_CLOSE && (int)vals[0] != NVG_WINDING) {
- ctx->commandx = vals[nvals-2];
- ctx->commandy = vals[nvals-1];
- }
-}
-
-
-static void nvg__clearPathCache(struct NVGcontext* ctx)
-{
- ctx->cache->npoints = 0;
- ctx->cache->npaths = 0;
-}
-
-static struct NVGpath* nvg__lastPath(struct NVGcontext* ctx)
-{
- if (ctx->cache->npaths > 0)
- return &ctx->cache->paths[ctx->cache->npaths-1];
- return NULL;
-}
-
-static void nvg__addPath(struct NVGcontext* ctx)
-{
- struct NVGpath* path;
- if (ctx->cache->npaths+1 > ctx->cache->cpaths) {
- struct NVGpath* paths;
- int cpaths = ctx->cache->npaths+1 + ctx->cache->cpaths/2;
- paths = (struct NVGpath*)realloc(ctx->cache->paths, sizeof(struct NVGpath)*cpaths);
- if (paths == NULL) return;
- ctx->cache->paths = paths;
- ctx->cache->cpaths = cpaths;
- }
- path = &ctx->cache->paths[ctx->cache->npaths];
- memset(path, 0, sizeof(*path));
- path->first = ctx->cache->npoints;
- path->winding = NVG_CCW;
-
- ctx->cache->npaths++;
-}
-
-static struct NVGpoint* nvg__lastPoint(struct NVGcontext* ctx)
-{
- if (ctx->cache->npoints > 0)
- return &ctx->cache->points[ctx->cache->npoints-1];
- return NULL;
-}
-
-static void nvg__addPoint(struct NVGcontext* ctx, float x, float y, int flags)
-{
- struct NVGpath* path = nvg__lastPath(ctx);
- struct NVGpoint* pt;
- if (path == NULL) return;
-
- if (ctx->cache->npoints > 0) {
- pt = nvg__lastPoint(ctx);
- if (nvg__ptEquals(pt->x,pt->y, x,y, ctx->distTol)) {
- pt->flags |= flags;
- return;
- }
- }
-
- if (ctx->cache->npoints+1 > ctx->cache->cpoints) {
- struct NVGpoint* points;
- int cpoints = ctx->cache->npoints+1 + ctx->cache->cpoints/2;
- points = (struct NVGpoint*)realloc(ctx->cache->points, sizeof(struct NVGpoint)*cpoints);
- if (points == NULL) return;
- ctx->cache->points = points;
- ctx->cache->cpoints = cpoints;
- }
-
- pt = &ctx->cache->points[ctx->cache->npoints];
- memset(pt, 0, sizeof(*pt));
- pt->x = x;
- pt->y = y;
- pt->flags = flags;
-
- ctx->cache->npoints++;
- path->count++;
-}
-
-static void nvg__closePath(struct NVGcontext* ctx)
-{
- struct NVGpath* path = nvg__lastPath(ctx);
- if (path == NULL) return;
- path->closed = 1;
-}
-
-static void nvg__pathWinding(struct NVGcontext* ctx, int winding)
-{
- struct NVGpath* path = nvg__lastPath(ctx);
- if (path == NULL) return;
- path->winding = winding;
-}
-
-static float nvg__getAverageScale(float *t)
-{
- float sx = sqrtf(t[0]*t[0] + t[2]*t[2]);
- float sy = sqrtf(t[1]*t[1] + t[3]*t[3]);
- return (sx + sy) * 0.5f;
-}
-
-static struct NVGvertex* nvg__allocTempVerts(struct NVGcontext* ctx, int nverts)
-{
- if (nverts > ctx->cache->cverts) {
- struct NVGvertex* verts;
- int cverts = (nverts + 0xff) & ~0xff; // Round up to prevent allocations when things change just slightly.
- verts = (struct NVGvertex*)realloc(ctx->cache->verts, sizeof(struct NVGvertex)*cverts);
- if (verts == NULL) return NULL;
- ctx->cache->verts = verts;
- ctx->cache->cverts = cverts;
- }
-
- return ctx->cache->verts;
-}
-
-static float nvg__triarea2(float ax, float ay, float bx, float by, float cx, float cy)
-{
- float abx = bx - ax;
- float aby = by - ay;
- float acx = cx - ax;
- float acy = cy - ay;
- return acx*aby - abx*acy;
-}
-
-static float nvg__polyArea(struct NVGpoint* pts, int npts)
-{
- int i;
- float area = 0;
- for (i = 2; i < npts; i++) {
- struct NVGpoint* a = &pts[0];
- struct NVGpoint* b = &pts[i-1];
- struct NVGpoint* c = &pts[i];
- area += nvg__triarea2(a->x,a->y, b->x,b->y, c->x,c->y);
- }
- return area * 0.5f;
-}
-
-static void nvg__polyReverse(struct NVGpoint* pts, int npts)
-{
- struct NVGpoint tmp;
- int i = 0, j = npts-1;
- while (i < j) {
- tmp = pts[i];
- pts[i] = pts[j];
- pts[j] = tmp;
- i++;
- j--;
- }
-}
-
-
-static void nvg__vset(struct NVGvertex* vtx, float x, float y, float u, float v)
-{
- vtx->x = x;
- vtx->y = y;
- vtx->u = u;
- vtx->v = v;
-}
-
-static void nvg__tesselateBezier(struct NVGcontext* ctx,
- float x1, float y1, float x2, float y2,
- float x3, float y3, float x4, float y4,
- int level, int type)
-{
- float x12,y12,x23,y23,x34,y34,x123,y123,x234,y234,x1234,y1234;
- float dx,dy,d2,d3;
-
- if (level > 10) return;
-
- x12 = (x1+x2)*0.5f;
- y12 = (y1+y2)*0.5f;
- x23 = (x2+x3)*0.5f;
- y23 = (y2+y3)*0.5f;
- x34 = (x3+x4)*0.5f;
- y34 = (y3+y4)*0.5f;
- x123 = (x12+x23)*0.5f;
- y123 = (y12+y23)*0.5f;
-
- dx = x3 - x1;
- dy = y3 - y1;
- d2 = nvg__absf(((x2 - x4) * dy - (y2 - y4) * dx));
- d3 = nvg__absf(((x3 - x4) * dy - (y3 - y4) * dx));
-
- if ((d2 + d3)*(d2 + d3) < ctx->tessTol * (dx*dx + dy*dy)) {
- nvg__addPoint(ctx, x4, y4, type);
- return;
- }
-
-/* if (nvg__absf(x1+x3-x2-x2) + nvg__absf(y1+y3-y2-y2) + nvg__absf(x2+x4-x3-x3) + nvg__absf(y2+y4-y3-y3) < ctx->tessTol) {
- nvg__addPoint(ctx, x4, y4, type);
- return;
- }*/
-
- x234 = (x23+x34)*0.5f;
- y234 = (y23+y34)*0.5f;
- x1234 = (x123+x234)*0.5f;
- y1234 = (y123+y234)*0.5f;
-
- nvg__tesselateBezier(ctx, x1,y1, x12,y12, x123,y123, x1234,y1234, level+1, 0);
- nvg__tesselateBezier(ctx, x1234,y1234, x234,y234, x34,y34, x4,y4, level+1, type);
-}
-
-static void nvg__flattenPaths(struct NVGcontext* ctx)
-{
- struct NVGpathCache* cache = ctx->cache;
-// struct NVGstate* state = nvg__getState(ctx);
- struct NVGpoint* last;
- struct NVGpoint* p0;
- struct NVGpoint* p1;
- struct NVGpoint* pts;
- struct NVGpath* path;
- int i, j;
- float* cp1;
- float* cp2;
- float* p;
- float area;
-
- if (cache->npaths > 0)
- return;
-
- // Flatten
- i = 0;
- while (i < ctx->ncommands) {
- int cmd = (int)ctx->commands[i];
- switch (cmd) {
- case NVG_MOVETO:
- nvg__addPath(ctx);
- p = &ctx->commands[i+1];
- nvg__addPoint(ctx, p[0], p[1], NVG_PT_CORNER);
- i += 3;
- break;
- case NVG_LINETO:
- p = &ctx->commands[i+1];
- nvg__addPoint(ctx, p[0], p[1], NVG_PT_CORNER);
- i += 3;
- break;
- case NVG_BEZIERTO:
- last = nvg__lastPoint(ctx);
- if (last != NULL) {
- cp1 = &ctx->commands[i+1];
- cp2 = &ctx->commands[i+3];
- p = &ctx->commands[i+5];
- nvg__tesselateBezier(ctx, last->x,last->y, cp1[0],cp1[1], cp2[0],cp2[1], p[0],p[1], 0, NVG_PT_CORNER);
- }
- i += 7;
- break;
- case NVG_CLOSE:
- nvg__closePath(ctx);
- i++;
- break;
- case NVG_WINDING:
- nvg__pathWinding(ctx, (int)ctx->commands[i+1]);
- i += 2;
- break;
- default:
- i++;
- }
- }
-
- cache->bounds[0] = cache->bounds[1] = 1e6f;
- cache->bounds[2] = cache->bounds[3] = -1e6f;
-
- // Calculate the direction and length of line segments.
- for (j = 0; j < cache->npaths; j++) {
- path = &cache->paths[j];
- pts = &cache->points[path->first];
-
- // If the first and last points are the same, remove the last, mark as closed path.
- p0 = &pts[path->count-1];
- p1 = &pts[0];
- if (nvg__ptEquals(p0->x,p0->y, p1->x,p1->y, ctx->distTol)) {
- path->count--;
- p0 = &pts[path->count-1];
- path->closed = 1;
- }
-
- // Enforce winding.
- if (path->count > 2) {
- area = nvg__polyArea(pts, path->count);
- if (path->winding == NVG_CCW && area < 0.0f)
- nvg__polyReverse(pts, path->count);
- if (path->winding == NVG_CW && area > 0.0f)
- nvg__polyReverse(pts, path->count);
- }
-
- for(i = 0; i < path->count; ++i) {
- // Calculate segment direction and length
- p0->dx = p1->x - p0->x;
- p0->dy = p1->y - p0->y;
- p0->len = nvg__normalize(&p0->dx, &p0->dy);
- // Update bounds
- cache->bounds[0] = nvg__minf(cache->bounds[0], p0->x);
- cache->bounds[1] = nvg__minf(cache->bounds[1], p0->y);
- cache->bounds[2] = nvg__maxf(cache->bounds[2], p0->x);
- cache->bounds[3] = nvg__maxf(cache->bounds[3], p0->y);
- // Advance
- p0 = p1++;
- }
- }
-}
-
-static int nvg__curveDivs(float r, float arc, float tol)
-{
- float da = acosf(r / (r + tol)) * 2.0f;
- return nvg__maxi(2, (int)ceilf(arc / da));
-}
-
-static void nvg__chooseBevel(int bevel, struct NVGpoint* p0, struct NVGpoint* p1, float w,
- float* x0, float* y0, float* x1, float* y1)
-{
- if (bevel) {
- *x0 = p1->x + p0->dy * w;
- *y0 = p1->y - p0->dx * w;
- *x1 = p1->x + p1->dy * w;
- *y1 = p1->y - p1->dx * w;
- } else {
- *x0 = p1->x + p1->dmx * w;
- *y0 = p1->y + p1->dmy * w;
- *x1 = p1->x + p1->dmx * w;
- *y1 = p1->y + p1->dmy * w;
- }
-}
-
-static struct NVGvertex* nvg__roundJoin(struct NVGvertex* dst, struct NVGpoint* p0, struct NVGpoint* p1,
- float lw, float rw, float lu, float ru, int ncap, float fringe)
-{
- int i, n;
- float dlx0 = p0->dy;
- float dly0 = -p0->dx;
- float dlx1 = p1->dy;
- float dly1 = -p1->dx;
- NVG_NOTUSED(fringe);
-
- if (p1->flags & NVG_PT_LEFT) {
- float lx0,ly0,lx1,ly1,a0,a1;
- nvg__chooseBevel(p1->flags & NVG_PR_INNERBEVEL, p0, p1, lw, &lx0,&ly0, &lx1,&ly1);
- a0 = atan2f(-dly0, -dlx0);
- a1 = atan2f(-dly1, -dlx1);
- if (a1 > a0) a1 -= NVG_PI*2;
-
- nvg__vset(dst, lx0, ly0, lu,1); dst++;
- nvg__vset(dst, p1->x - dlx0*rw, p1->y - dly0*rw, ru,1); dst++;
-
- n = nvg__clampi((int)ceilf(((a0 - a1) / NVG_PI) * ncap), 2, ncap);
- for (i = 0; i < n; i++) {
- float u = i/(float)(n-1);
- float a = a0 + u*(a1-a0);
- float rx = p1->x + cosf(a) * rw;
- float ry = p1->y + sinf(a) * rw;
- nvg__vset(dst, p1->x, p1->y, 0.5f,1); dst++;
- nvg__vset(dst, rx, ry, ru,1); dst++;
- }
-
- nvg__vset(dst, lx1, ly1, lu,1); dst++;
- nvg__vset(dst, p1->x - dlx1*rw, p1->y - dly1*rw, ru,1); dst++;
-
- } else {
- float rx0,ry0,rx1,ry1,a0,a1;
- nvg__chooseBevel(p1->flags & NVG_PR_INNERBEVEL, p0, p1, -rw, &rx0,&ry0, &rx1,&ry1);
- a0 = atan2f(dly0, dlx0);
- a1 = atan2f(dly1, dlx1);
- if (a1 < a0) a1 += NVG_PI*2;
-
- nvg__vset(dst, p1->x + dlx0*rw, p1->y + dly0*rw, lu,1); dst++;
- nvg__vset(dst, rx0, ry0, ru,1); dst++;
-
- n = nvg__clampi((int)ceilf(((a1 - a0) / NVG_PI) * ncap), 2, ncap);
- for (i = 0; i < n; i++) {
- float u = i/(float)(n-1);
- float a = a0 + u*(a1-a0);
- float lx = p1->x + cosf(a) * lw;
- float ly = p1->y + sinf(a) * lw;
- nvg__vset(dst, lx, ly, lu,1); dst++;
- nvg__vset(dst, p1->x, p1->y, 0.5f,1); dst++;
- }
-
- nvg__vset(dst, p1->x + dlx1*rw, p1->y + dly1*rw, lu,1); dst++;
- nvg__vset(dst, rx1, ry1, ru,1); dst++;
-
- }
- return dst;
-}
-
-static struct NVGvertex* nvg__bevelJoin(struct NVGvertex* dst, struct NVGpoint* p0, struct NVGpoint* p1,
- float lw, float rw, float lu, float ru, float fringe)
-{
- float rx0,ry0,rx1,ry1;
- float lx0,ly0,lx1,ly1;
- float mx,my,len,mu;
- float dlx0 = p0->dy;
- float dly0 = -p0->dx;
- float dlx1 = p1->dy;
- float dly1 = -p1->dx;
- NVG_NOTUSED(fringe);
-
- if (p1->flags & NVG_PT_LEFT) {
- nvg__chooseBevel(p1->flags & NVG_PR_INNERBEVEL, p0, p1, lw, &lx0,&ly0, &lx1,&ly1);
-
- nvg__vset(dst, lx0, ly0, lu,1); dst++;
- nvg__vset(dst, p1->x - dlx0*rw, p1->y - dly0*rw, ru,1); dst++;
-
- if (p1->flags & NVG_PT_BEVEL) {
- // TODO: this needs more work.
- mx = (dlx0 + dlx1) * 0.5f;
- my = (dly0 + dly1) * 0.5f;
- len = sqrtf(mx*mx + my*my);
- mu = ru + len*(lu-ru)*0.5f;
-
- nvg__vset(dst, lx0, ly0, lu,1); dst++;
- nvg__vset(dst, p1->x - dlx0*rw, p1->y - dly0*rw, ru,1); dst++;
-
- nvg__vset(dst, lx1, ly1, lu,1); dst++;
- nvg__vset(dst, p1->x - dlx1*rw, p1->y - dly1*rw, ru,1); dst++;
- } else {
- rx0 = p1->x - p1->dmx * rw;
- ry0 = p1->y - p1->dmy * rw;
-
- nvg__vset(dst, p1->x, p1->y, 0.5f,1); dst++;
- nvg__vset(dst, p1->x - dlx0*rw, p1->y - dly0*rw, ru,1); dst++;
-
- nvg__vset(dst, rx0, ry0, ru,1); dst++;
- nvg__vset(dst, rx0, ry0, ru,1); dst++;
-
- nvg__vset(dst, p1->x, p1->y, 0.5f,1); dst++;
- nvg__vset(dst, p1->x - dlx1*rw, p1->y - dly1*rw, ru,1); dst++;
- }
-
- nvg__vset(dst, lx1, ly1, lu,1); dst++;
- nvg__vset(dst, p1->x - dlx1*rw, p1->y - dly1*rw, ru,1); dst++;
-
- } else {
- nvg__chooseBevel(p1->flags & NVG_PR_INNERBEVEL, p0, p1, -rw, &rx0,&ry0, &rx1,&ry1);
-
- nvg__vset(dst, p1->x + dlx0*lw, p1->y + dly0*lw, lu,1); dst++;
- nvg__vset(dst, rx0, ry0, ru,1); dst++;
-
- if (p1->flags & NVG_PT_BEVEL) {
- // TODO: this needs more work.
- mx = (dlx0 + dlx1) * 0.5f;
- my = (dly0 + dly1) * 0.5f;
- len = sqrtf(mx*mx + my*my);
- mu = lu + len*(ru-lu)*0.5f;
-
- nvg__vset(dst, p1->x + dlx0*lw, p1->y + dly0*lw, lu,1); dst++;
- nvg__vset(dst, rx0, ry0, ru,1); dst++;
-
- nvg__vset(dst, p1->x + dlx1*lw, p1->y + dly1*lw, lu,1); dst++;
- nvg__vset(dst, rx1, ry1, ru,1); dst++;
- } else {
- lx0 = p1->x + p1->dmx * lw;
- ly0 = p1->y + p1->dmy * lw;
-
- nvg__vset(dst, p1->x + dlx0*lw, p1->y + dly0*lw, lu,1); dst++;
- nvg__vset(dst, p1->x, p1->y, 0.5f,1); dst++;
-
- nvg__vset(dst, lx0, ly0, lu,1); dst++;
- nvg__vset(dst, lx0, ly0, lu,1); dst++;
-
- nvg__vset(dst, p1->x + dlx1*lw, p1->y + dly1*lw, lu,1); dst++;
- nvg__vset(dst, p1->x, p1->y, 0.5f,1); dst++;
- }
-
- nvg__vset(dst, p1->x + dlx1*lw, p1->y + dly1*lw, lu,1); dst++;
- nvg__vset(dst, rx1, ry1, ru,1); dst++;
- }
-
- return dst;
-
- NVG_NOTUSED(mu);
-}
-
-static int nvg__expandStrokeAndFill(struct NVGcontext* ctx, int feats, float w, int lineCap, int lineJoin, float miterLimit)
-{
- struct NVGpathCache* cache = ctx->cache;
- struct NVGpath* path;
- struct NVGpoint* pts;
- struct NVGvertex* verts;
- struct NVGvertex* dst;
- struct NVGpoint* p0;
- struct NVGpoint* p1;
- int cverts, convex, i, j, s, e;
- float wo = 0, iw = 0, aa = ctx->fringeWidth;
- int ncap = nvg__curveDivs(w, NVG_PI, ctx->tessTol / 4.0f);
- int nleft = 0;
-
- if (w > 0.0f) iw = 1.0f / w;
-
- // Calculate which joins needs extra vertices to append, and gather vertex count.
- for (i = 0; i < cache->npaths; i++) {
- path = &cache->paths[i];
- pts = &cache->points[path->first];
- path->nbevel = 0;
- nleft = 0;
-
- p0 = &pts[path->count-1];
- p1 = &pts[0];
- for (j = 0; j < path->count; j++) {
- float dlx0, dly0, dlx1, dly1, dmr2, cross, limit;
- dlx0 = p0->dy;
- dly0 = -p0->dx;
- dlx1 = p1->dy;
- dly1 = -p1->dx;
- // Calculate extrusions
- p1->dmx = (dlx0 + dlx1) * 0.5f;
- p1->dmy = (dly0 + dly1) * 0.5f;
- dmr2 = p1->dmx*p1->dmx + p1->dmy*p1->dmy;
- if (dmr2 > 0.000001f) {
- float scale = 1.0f / dmr2;
- if (scale > 600.0f) {
- scale = 600.0f;
- }
- p1->dmx *= scale;
- p1->dmy *= scale;
- }
-
- // Clear flags, but keep the corner.
- p1->flags = (p1->flags & NVG_PT_CORNER) ? NVG_PT_CORNER : 0;
-
- // Keep track of left turns.
- cross = p1->dx * p0->dy - p0->dx * p1->dy;
- if (cross > 0.0f) {
- nleft++;
- p1->flags |= NVG_PT_LEFT;
- }
-
- // Calculate if we should use bevel or miter for inner join.
- limit = nvg__maxf(1.01f, nvg__minf(p0->len, p1->len) * iw);
- if ((dmr2 * limit*limit) < 1.0f)
- p1->flags |= NVG_PR_INNERBEVEL;
-
- // Check to see if the corner needs to be beveled.
- if (p1->flags & NVG_PT_CORNER) {
- if ((dmr2 * miterLimit*miterLimit) < 1.0f || lineJoin == NVG_BEVEL || lineJoin == NVG_ROUND) {
- p1->flags |= NVG_PT_BEVEL;
- }
- }
-
- if ((p1->flags & (NVG_PT_BEVEL | NVG_PR_INNERBEVEL)) != 0)
- path->nbevel++;
-
- p0 = p1++;
- }
-
- path->convex = (nleft == path->count) ? 1 : 0;
- }
-
- // Calculate max vertex usage.
- cverts = 0;
- for (i = 0; i < cache->npaths; i++) {
- path = &cache->paths[i];
- if (feats & NVG_FILL)
- cverts += path->count + path->nbevel + 1;
- if (feats & NVG_STROKE) {
- int loop = ((feats & NVG_CAPS) && path->closed == 0) ? 0 : 1;
- if (lineCap == NVG_ROUND)
- cverts += (path->count + path->nbevel*(ncap+2) + 1) * 2; // plus one for loop
- else
- cverts += (path->count + path->nbevel*5 + 1) * 2; // plus one for loop
- if (loop == 0) {
- // space for caps
- if (lineCap == NVG_ROUND) {
- cverts += (ncap*2 + 2)*2;
- } else {
- cverts += (3+3)*2;
- }
- }
- }
- }
-
- verts = nvg__allocTempVerts(ctx, cverts);
- if (verts == NULL) return 0;
-
- if ((feats & NVG_FILL) && cache->npaths == 1 && cache->paths[0].convex)
- convex = 1;
- else
- convex = 0;
-
- for (i = 0; i < cache->npaths; i++) {
- path = &cache->paths[i];
- pts = &cache->points[path->first];
-
- // Calculate shape vertices.
- if (feats & NVG_FILL) {
- wo = 0.5f*aa;
- dst = verts;
- path->fill = dst;
-
- if (w == 0.0f) {
- for (j = 0; j < path->count; ++j) {
- nvg__vset(dst, pts[j].x, pts[j].y, 0.5f,1);
- dst++;
- }
- } else {
- // Looping
- p0 = &pts[path->count-1];
- p1 = &pts[0];
- for (j = 0; j < path->count; ++j) {
- if (p1->flags & NVG_PT_BEVEL) {
- float dlx0 = p0->dy;
- float dly0 = -p0->dx;
- float dlx1 = p1->dy;
- float dly1 = -p1->dx;
- if (p1->flags & NVG_PT_LEFT) {
- float lx = p1->x + p1->dmx * wo;
- float ly = p1->y + p1->dmy * wo;
- nvg__vset(dst, lx, ly, 0.5f,1); dst++;
- } else {
- float lx0 = p1->x + dlx0 * wo;
- float ly0 = p1->y + dly0 * wo;
- float lx1 = p1->x + dlx1 * wo;
- float ly1 = p1->y + dly1 * wo;
- nvg__vset(dst, lx0, ly0, 0.5f,1); dst++;
- nvg__vset(dst, lx1, ly1, 0.5f,1); dst++;
- }
- } else {
- nvg__vset(dst, p1->x + (p1->dmx * wo), p1->y + (p1->dmy * wo), 0.5f,1); dst++;
- }
- p0 = p1++;
- }
- }
-
- path->nfill = (int)(dst - verts);
- verts = dst;
- } else {
- wo = 0.0f;
- path->fill = 0;
- path->nfill = 0;
- }
-
- // Calculate fringe or stroke
- if (feats & NVG_STROKE) {
- float lw = w + wo, rw = w - wo;
- float lu = 0, ru = 1;
- int loop = ((feats & NVG_CAPS) && path->closed == 0) ? 0 : 1;
- dst = verts;
- path->stroke = dst;
-
- // Create only half a fringe for convex shapes so that
- // the shape can be rendered without stenciling.
- if (convex) {
- lw = wo; // This should generate the same vertex as fill inset above.
- lu = 0.5f; // Set outline fade at middle.
- }
-
- if (loop) {
- // Looping
- p0 = &pts[path->count-1];
- p1 = &pts[0];
- s = 0;
- e = path->count;
- } else {
- // Add cap
- p0 = &pts[0];
- p1 = &pts[1];
- s = 1;
- e = path->count-1;
- }
-
- if (loop == 0) {
- // Add cap
- float dx, dy, dlx, dly, px, py;
- dx = p1->x - p0->x;
- dy = p1->y - p0->y;
- nvg__normalize(&dx, &dy);
- dlx = dy;
- dly = -dx;
- if (lineCap == NVG_BUTT || lineCap == NVG_SQUARE) {
- if (lineCap == NVG_BUTT) {
- px = p0->x + dx*ctx->fringeWidth*0.5f;
- py = p0->y + dy*ctx->fringeWidth*0.5f;
- } else /*if (lineCap == NVG_SQUARE)*/ {
- px = p0->x - dx*(w - ctx->fringeWidth);
- py = p0->y - dy*(w - ctx->fringeWidth);
- }
- nvg__vset(dst, px + dlx*lw - dx*aa, py + dly*lw - dy*aa, lu,0); dst++;
- nvg__vset(dst, px - dlx*rw - dx*aa, py - dly*rw - dy*aa, ru,0); dst++;
- nvg__vset(dst, px + dlx*lw, py + dly * lw, lu,1); dst++;
- nvg__vset(dst, px - dlx*rw, py - dly * rw, ru,1); dst++;
- } else if (lineCap == NVG_ROUND) {
- px = p0->x;
- py = p0->y;
- for (j = 0; j < ncap; j++) {
- float a = j/(float)(ncap-1)*NVG_PI;
- float ax = cosf(a) * w, ay = sinf(a) * w;
- nvg__vset(dst, px - dlx*ax - dx*ay, py - dly*ax - dy*ay, lu,1); dst++;
- nvg__vset(dst, px, py, 0.5f,1); dst++;
- }
- nvg__vset(dst, px + dlx*lw, py + dly * lw, lu,1); dst++;
- nvg__vset(dst, px - dlx*rw, py - dly * rw, ru,1); dst++;
- }
- }
-
- for (j = s; j < e; ++j) {
- if ((p1->flags & (NVG_PT_BEVEL | NVG_PR_INNERBEVEL)) != 0) {
- if (lineJoin == NVG_ROUND) {
- dst = nvg__roundJoin(dst, p0, p1, lw, rw, lu, ru, ncap, ctx->fringeWidth);
- } else {
- dst = nvg__bevelJoin(dst, p0, p1, lw, rw, lu, ru, ctx->fringeWidth);
- }
- } else {
- nvg__vset(dst, p1->x + (p1->dmx * lw), p1->y + (p1->dmy * lw), lu,1); dst++;
- nvg__vset(dst, p1->x - (p1->dmx * rw), p1->y - (p1->dmy * rw), ru,1); dst++;
- }
- p0 = p1++;
- }
-
- if (loop) {
- // Loop it
- nvg__vset(dst, verts[0].x, verts[0].y, lu,1); dst++;
- nvg__vset(dst, verts[1].x, verts[1].y, ru,1); dst++;
- } else {
- // Add cap
- float dx, dy, dlx, dly, px, py;
- dx = p1->x - p0->x;
- dy = p1->y - p0->y;
- nvg__normalize(&dx, &dy);
- dlx = dy;
- dly = -dx;
- if (lineCap == NVG_BUTT || lineCap == NVG_SQUARE) {
- if (lineCap == NVG_BUTT) {
- px = p1->x - dx*ctx->fringeWidth*0.5f;
- py = p1->y - dy*ctx->fringeWidth*0.5f;
- } else /*if (lineCap == NVG_SQUARE)*/ {
- px = p1->x + dx*(w - ctx->fringeWidth);
- py = p1->y + dy*(w - ctx->fringeWidth);
- }
- nvg__vset(dst, px + dlx*lw, py + dly * lw, lu,1); dst++;
- nvg__vset(dst, px - dlx*rw, py - dly * rw, ru,1); dst++;
- nvg__vset(dst, px + dlx*lw + dx*aa, py + dly*lw + dy*aa, lu,0); dst++;
- nvg__vset(dst, px - dlx*rw + dx*aa, py - dly*rw + dy*aa, ru,0); dst++;
- } else if (lineCap == NVG_ROUND) {
- px = p1->x;
- py = p1->y;
- nvg__vset(dst, px + dlx*lw, py + dly * lw, lu,1); dst++;
- nvg__vset(dst, px - dlx*rw, py - dly * rw, ru,1); dst++;
- for (j = 0; j < ncap; j++) {
- float a = j/(float)(ncap-1)*NVG_PI;
- float ax = cosf(a) * w, ay = sinf(a) * w;
- nvg__vset(dst, px, py, 0.5f,1); dst++;
- nvg__vset(dst, px - dlx*ax + dx*ay, py - dly*ax + dy*ay, lu,1); dst++;
- }
- }
- }
-
- path->nstroke = (int)(dst - verts);
-
- verts = dst;
- } else {
- path->stroke = 0;
- path->nstroke = 0;
- }
- }
-
- return 1;
-}
-
-
-// Draw
-void nvgBeginPath(struct NVGcontext* ctx)
-{
- ctx->ncommands = 0;
- nvg__clearPathCache(ctx);
-}
-
-void nvgMoveTo(struct NVGcontext* ctx, float x, float y)
-{
- float vals[] = { NVG_MOVETO, x, y };
- nvg__appendCommands(ctx, vals, NVG_COUNTOF(vals));
-}
-
-void nvgLineTo(struct NVGcontext* ctx, float x, float y)
-{
- float vals[] = { NVG_LINETO, x, y };
- nvg__appendCommands(ctx, vals, NVG_COUNTOF(vals));
-}
-
-void nvgBezierTo(struct NVGcontext* ctx, float c1x, float c1y, float c2x, float c2y, float x, float y)
-{
- float vals[] = { NVG_BEZIERTO, c1x, c1y, c2x, c2y, x, y };
- nvg__appendCommands(ctx, vals, NVG_COUNTOF(vals));
-}
-
-void nvgArcTo(struct NVGcontext* ctx, float x1, float y1, float x2, float y2, float radius)
-{
- float x0 = ctx->commandx;
- float y0 = ctx->commandy;
- float dx0,dy0, dx1,dy1, a, d, cx,cy, a0,a1;
- int dir;
-
- if (ctx->ncommands == 0) {
- return;
- }
-
- // Handle degenerate cases.
- if (nvg__ptEquals(x0,y0, x1,y1, ctx->distTol) ||
- nvg__ptEquals(x1,y1, x2,y2, ctx->distTol) ||
- nvg__distPtSeg(x1,y1, x0,y0, x2,y2) < ctx->distTol*ctx->distTol ||
- radius < ctx->distTol) {
- nvgLineTo(ctx, x1,y1);
- return;
- }
-
- // Calculate tangential circle to lines (x0,y0)-(x1,y1) and (x1,y1)-(x2,y2).
- dx0 = x0-x1;
- dy0 = y0-y1;
- dx1 = x2-x1;
- dy1 = y2-y1;
- nvg__normalize(&dx0,&dy0);
- nvg__normalize(&dx1,&dy1);
- a = nvg__acosf(dx0*dx1 + dy0*dy1);
- d = radius / nvg__tanf(a/2.0f);
-
-// printf("a=%f° d=%f\n", a/NVG_PI*180.0f, d);
-
- if (d > 10000.0f) {
- nvgLineTo(ctx, x1,y1);
- return;
- }
-
- if (nvg__cross(dx0,dy0, dx1,dy1) > 0.0f) {
- cx = x1 + dx0*d + dy0*radius;
- cy = y1 + dy0*d + -dx0*radius;
- a0 = nvg__atan2f(dx0, -dy0);
- a1 = nvg__atan2f(-dx1, dy1);
- dir = NVG_CW;
-// printf("CW c=(%f, %f) a0=%f° a1=%f°\n", cx, cy, a0/NVG_PI*180.0f, a1/NVG_PI*180.0f);
- } else {
- cx = x1 + dx0*d + -dy0*radius;
- cy = y1 + dy0*d + dx0*radius;
- a0 = nvg__atan2f(-dx0, dy0);
- a1 = nvg__atan2f(dx1, -dy1);
- dir = NVG_CCW;
-// printf("CCW c=(%f, %f) a0=%f° a1=%f°\n", cx, cy, a0/NVG_PI*180.0f, a1/NVG_PI*180.0f);
- }
-
- nvgArc(ctx, cx, cy, radius, a0, a1, dir);
-}
-
-void nvgClosePath(struct NVGcontext* ctx)
-{
- float vals[] = { NVG_CLOSE };
- nvg__appendCommands(ctx, vals, NVG_COUNTOF(vals));
-}
-
-void nvgPathWinding(struct NVGcontext* ctx, int dir)
-{
- float vals[] = { NVG_WINDING, (float)dir };
- nvg__appendCommands(ctx, vals, NVG_COUNTOF(vals));
-}
-
-void nvgArc(struct NVGcontext* ctx, float cx, float cy, float r, float a0, float a1, int dir)
-{
- float a = 0, da = 0, hda = 0, kappa = 0;
- float dx = 0, dy = 0, x = 0, y = 0, tanx = 0, tany = 0;
- float px = 0, py = 0, ptanx = 0, ptany = 0;
- float vals[3 + 5*7 + 100];
- int i, ndivs, nvals;
- int move = ctx->ncommands > 0 ? NVG_LINETO : NVG_MOVETO;
-
- // Clamp angles
- da = a1 - a0;
- if (dir == NVG_CW) {
- if (nvg__absf(da) >= NVG_PI*2) {
- da = NVG_PI*2;
- } else {
- while (da < 0.0f) da += NVG_PI*2;
- }
- } else {
- if (nvg__absf(da) >= NVG_PI*2) {
- da = -NVG_PI*2;
- } else {
- while (da > 0.0f) da -= NVG_PI*2;
- }
- }
-
- // Split arc into max 90 degree segments.
- ndivs = nvg__maxi(1, nvg__mini((int)(nvg__absf(da) / (NVG_PI*0.5f) + 0.5f), 5));
- hda = (da / (float)ndivs) / 2.0f;
- kappa = nvg__absf(4.0f / 3.0f * (1.0f - nvg__cosf(hda)) / nvg__sinf(hda));
-
- if (dir == NVG_CCW)
- kappa = -kappa;
-
- nvals = 0;
- for (i = 0; i <= ndivs; i++) {
- a = a0 + da * (i/(float)ndivs);
- dx = nvg__cosf(a);
- dy = nvg__sinf(a);
- x = cx + dx*r;
- y = cy + dy*r;
- tanx = -dy*r*kappa;
- tany = dx*r*kappa;
-
- if (i == 0) {
- vals[nvals++] = (float)move;
- vals[nvals++] = x;
- vals[nvals++] = y;
- } else {
- vals[nvals++] = NVG_BEZIERTO;
- vals[nvals++] = px+ptanx;
- vals[nvals++] = py+ptany;
- vals[nvals++] = x-tanx;
- vals[nvals++] = y-tany;
- vals[nvals++] = x;
- vals[nvals++] = y;
- }
- px = x;
- py = y;
- ptanx = tanx;
- ptany = tany;
- }
-
- nvg__appendCommands(ctx, vals, nvals);
-}
-
-void nvgRect(struct NVGcontext* ctx, float x, float y, float w, float h)
-{
- float vals[] = {
- NVG_MOVETO, x,y,
- NVG_LINETO, x+w,y,
- NVG_LINETO, x+w,y+h,
- NVG_LINETO, x,y+h,
- NVG_CLOSE
- };
- nvg__appendCommands(ctx, vals, NVG_COUNTOF(vals));
-}
-
-void nvgRoundedRect(struct NVGcontext* ctx, float x, float y, float w, float h, float r)
-{
- if (r < 0.1f) {
- nvgRect(ctx, x,y,w,h);
- return;
- }
- else {
- float vals[] = {
- NVG_MOVETO, x+r, y,
- NVG_LINETO, x+w-r, y,
- NVG_BEZIERTO, x+w-r*(1-NVG_KAPPA90), y, x+w, y+r*(1-NVG_KAPPA90), x+w, y+r,
- NVG_LINETO, x+w, y+h-r,
- NVG_BEZIERTO, x+w, y+h-r*(1-NVG_KAPPA90), x+w-r*(1-NVG_KAPPA90), y+h, x+w-r, y+h,
- NVG_LINETO, x+r, y+h,
- NVG_BEZIERTO, x+r*(1-NVG_KAPPA90), y+h, x, y+h-r*(1-NVG_KAPPA90), x, y+h-r,
- NVG_LINETO, x, y+r,
- NVG_BEZIERTO, x, y+r*(1-NVG_KAPPA90), x+r*(1-NVG_KAPPA90), y, x+r, y,
- NVG_CLOSE
- };
- nvg__appendCommands(ctx, vals, NVG_COUNTOF(vals));
- }
-}
-
-void nvgEllipse(struct NVGcontext* ctx, float cx, float cy, float rx, float ry)
-{
- float vals[] = {
- NVG_MOVETO, cx+rx, cy,
- NVG_BEZIERTO, cx+rx, cy+ry*NVG_KAPPA90, cx+rx*NVG_KAPPA90, cy+ry, cx, cy+ry,
- NVG_BEZIERTO, cx-rx*NVG_KAPPA90, cy+ry, cx-rx, cy+ry*NVG_KAPPA90, cx-rx, cy,
- NVG_BEZIERTO, cx-rx, cy-ry*NVG_KAPPA90, cx-rx*NVG_KAPPA90, cy-ry, cx, cy-ry,
- NVG_BEZIERTO, cx+rx*NVG_KAPPA90, cy-ry, cx+rx, cy-ry*NVG_KAPPA90, cx+rx, cy,
- NVG_CLOSE
- };
- nvg__appendCommands(ctx, vals, NVG_COUNTOF(vals));
-}
-
-void nvgCircle(struct NVGcontext* ctx, float cx, float cy, float r)
-{
- nvgEllipse(ctx, cx,cy, r,r);
-}
-
-void nvgDebugDumpPathCache(struct NVGcontext* ctx)
-{
- const struct NVGpath* path;
- int i, j;
-
- printf("Dumping %d cached paths\n", ctx->cache->npaths);
- for (i = 0; i < ctx->cache->npaths; i++) {
- path = &ctx->cache->paths[i];
- printf(" - Path %d\n", i);
- if (path->nfill) {
- printf(" - fill: %d\n", path->nfill);
- for (j = 0; j < path->nfill; j++)
- printf("%f\t%f\n", path->fill[j].x, path->fill[j].y);
- }
- if (path->nstroke) {
- printf(" - stroke: %d\n", path->nstroke);
- for (j = 0; j < path->nstroke; j++)
- printf("%f\t%f\n", path->stroke[j].x, path->stroke[j].y);
- }
- }
-}
-
-void nvgFill(struct NVGcontext* ctx)
-{
- struct NVGstate* state = nvg__getState(ctx);
- const struct NVGpath* path;
- int i;
-
- nvg__flattenPaths(ctx);
- if (ctx->params.edgeAntiAlias)
- nvg__expandStrokeAndFill(ctx, NVG_FILL|NVG_STROKE, ctx->fringeWidth, NVG_BUTT, NVG_MITER, 3.6f);
- else
- nvg__expandStrokeAndFill(ctx, NVG_FILL, 0.0f, NVG_BUTT, NVG_MITER, 1.2f);
-
- ctx->params.renderFill(ctx->params.userPtr, &state->fill, &state->scissor, ctx->fringeWidth,
- ctx->cache->bounds, ctx->cache->paths, ctx->cache->npaths);
-
- // Count triangles
- for (i = 0; i < ctx->cache->npaths; i++) {
- path = &ctx->cache->paths[i];
- ctx->fillTriCount += path->nfill-2;
- ctx->fillTriCount += path->nstroke-2;
- ctx->drawCallCount += 2;
- }
-}
-
-void nvgStroke(struct NVGcontext* ctx)
-{
- struct NVGstate* state = nvg__getState(ctx);
- float scale = nvg__getAverageScale(state->xform);
- float strokeWidth = nvg__clampf(state->strokeWidth * scale, 0.0f, 20.0f);
- struct NVGpaint strokePaint = state->stroke;
- const struct NVGpath* path;
- int i;
-
- if (strokeWidth < ctx->fringeWidth) {
- // If the stroke width is less than pixel size, use alpha to emulate coverate.
- // Since coverage is area, scale by alpha*alpha.
- float alpha = nvg__clampf(strokeWidth / ctx->fringeWidth, 0.0f, 1.0f);
- strokePaint.innerColor.a *= alpha*alpha;
- strokePaint.outerColor.a *= alpha*alpha;
- strokeWidth = ctx->fringeWidth;
- }
-
- nvg__flattenPaths(ctx);
- if (ctx->params.edgeAntiAlias)
- nvg__expandStrokeAndFill(ctx, NVG_STROKE|NVG_CAPS, strokeWidth*0.5f + ctx->fringeWidth*0.5f, state->lineCap, state->lineJoin, state->miterLimit);
- else
- nvg__expandStrokeAndFill(ctx, NVG_STROKE|NVG_CAPS, strokeWidth*0.5f, state->lineCap, state->lineJoin, state->miterLimit);
-
- ctx->params.renderStroke(ctx->params.userPtr, &strokePaint, &state->scissor, ctx->fringeWidth,
- strokeWidth, ctx->cache->paths, ctx->cache->npaths);
-
- // Count triangles
- for (i = 0; i < ctx->cache->npaths; i++) {
- path = &ctx->cache->paths[i];
- ctx->strokeTriCount += path->nstroke-2;
- ctx->drawCallCount++;
- }
-}
-
-// Add fonts
-int nvgCreateFont(struct NVGcontext* ctx, const char* name, const char* path)
-{
- return fonsAddFont(ctx->fs, name, path);
-}
-
-int nvgCreateFontMem(struct NVGcontext* ctx, const char* name, unsigned char* data, int ndata, int freeData)
-{
- return fonsAddFontMem(ctx->fs, name, data, ndata, freeData);
-}
-
-int nvgFindFont(struct NVGcontext* ctx, const char* name)
-{
- if (name == NULL) return -1;
- return fonsGetFontByName(ctx->fs, name);
-}
-
-// State setting
-void nvgFontSize(struct NVGcontext* ctx, float size)
-{
- struct NVGstate* state = nvg__getState(ctx);
- state->fontSize = size;
-}
-
-void nvgFontBlur(struct NVGcontext* ctx, float blur)
-{
- struct NVGstate* state = nvg__getState(ctx);
- state->fontBlur = blur;
-}
-
-void nvgTextLetterSpacing(struct NVGcontext* ctx, float spacing)
-{
- struct NVGstate* state = nvg__getState(ctx);
- state->letterSpacing = spacing;
-}
-
-void nvgTextLineHeight(struct NVGcontext* ctx, float lineHeight)
-{
- struct NVGstate* state = nvg__getState(ctx);
- state->lineHeight = lineHeight;
-}
-
-void nvgTextAlign(struct NVGcontext* ctx, int align)
-{
- struct NVGstate* state = nvg__getState(ctx);
- state->textAlign = align;
-}
-
-void nvgFontFaceId(struct NVGcontext* ctx, int font)
-{
- struct NVGstate* state = nvg__getState(ctx);
- state->fontId = font;
-}
-
-void nvgFontFace(struct NVGcontext* ctx, const char* font)
-{
- struct NVGstate* state = nvg__getState(ctx);
- state->fontId = fonsGetFontByName(ctx->fs, font);
-}
-
-static float nvg__quantize(float a, float d)
-{
- return ((int)(a / d + 0.5f)) * d;
-}
-
-static float nvg__getFontScale(struct NVGstate* state)
-{
- return nvg__minf(nvg__quantize(nvg__getAverageScale(state->xform), 0.01f), 4.0f);
-}
-
-float nvgText(struct NVGcontext* ctx, float x, float y, const char* string, const char* end)
-{
- struct NVGstate* state = nvg__getState(ctx);
- struct NVGpaint paint;
- struct FONStextIter iter;
- struct FONSquad q;
- struct NVGvertex* verts;
- float scale = nvg__getFontScale(state) * ctx->devicePxRatio;
- float invscale = 1.0f / scale;
- int dirty[4];
- int cverts = 0;
- int nverts = 0;
-
- if (end == NULL)
- end = string + strlen(string);
-
- if (state->fontId == FONS_INVALID) return x;
-
- fonsSetSize(ctx->fs, state->fontSize*scale);
- fonsSetSpacing(ctx->fs, state->letterSpacing*scale);
- fonsSetBlur(ctx->fs, state->fontBlur*scale);
- fonsSetAlign(ctx->fs, state->textAlign);
- fonsSetFont(ctx->fs, state->fontId);
-
- cverts = nvg__maxi(2, (int)(end - string)) * 6; // conservative estimate.
- verts = nvg__allocTempVerts(ctx, cverts);
- if (verts == NULL) return x;
-
- fonsTextIterInit(ctx->fs, &iter, x*scale, y*scale, string, end);
- while (fonsTextIterNext(ctx->fs, &iter, &q)) {
- // Trasnform corners.
- float c[4*2];
- nvgTransformPoint(&c[0],&c[1], state->xform, q.x0*invscale, q.y0*invscale);
- nvgTransformPoint(&c[2],&c[3], state->xform, q.x1*invscale, q.y0*invscale);
- nvgTransformPoint(&c[4],&c[5], state->xform, q.x1*invscale, q.y1*invscale);
- nvgTransformPoint(&c[6],&c[7], state->xform, q.x0*invscale, q.y1*invscale);
- // Create triangles
- if (nverts+6 <= cverts) {
- nvg__vset(&verts[nverts], c[0], c[1], q.s0, q.t0); nverts++;
- nvg__vset(&verts[nverts], c[4], c[5], q.s1, q.t1); nverts++;
- nvg__vset(&verts[nverts], c[2], c[3], q.s1, q.t0); nverts++;
- nvg__vset(&verts[nverts], c[0], c[1], q.s0, q.t0); nverts++;
- nvg__vset(&verts[nverts], c[6], c[7], q.s0, q.t1); nverts++;
- nvg__vset(&verts[nverts], c[4], c[5], q.s1, q.t1); nverts++;
- }
- }
-
- // TODO: add back-end bit to do this just once per frame.
- if (fonsValidateTexture(ctx->fs, dirty)) {
- // Update texture
- if (ctx->fontImage != 0) {
- int iw, ih;
- const unsigned char* data = fonsGetTextureData(ctx->fs, &iw, &ih);
- int x = dirty[0];
- int y = dirty[1];
- int w = dirty[2] - dirty[0];
- int h = dirty[3] - dirty[1];
- ctx->params.renderUpdateTexture(ctx->params.userPtr, ctx->fontImage, x,y, w,h, data);
- }
- }
-
- // Render triangles.
- paint = state->fill;
- paint.image = ctx->fontImage;
- ctx->params.renderTriangles(ctx->params.userPtr, &paint, &state->scissor, verts, nverts);
-
- ctx->drawCallCount++;
- ctx->textTriCount += nverts/3;
-
- return iter.x;
-}
-
-void nvgTextBox(struct NVGcontext* ctx, float x, float y, float breakRowWidth, const char* string, const char* end)
-{
- struct NVGstate* state = nvg__getState(ctx);
- struct NVGtextRow rows[2];
- int nrows = 0, i;
- int oldAlign = state->textAlign;
- int haling = state->textAlign & (NVG_ALIGN_LEFT | NVG_ALIGN_CENTER | NVG_ALIGN_RIGHT);
- int valign = state->textAlign & (NVG_ALIGN_TOP | NVG_ALIGN_MIDDLE | NVG_ALIGN_BOTTOM | NVG_ALIGN_BASELINE);
- float lineh = 0;
-
- if (state->fontId == FONS_INVALID) return;
-
- nvgTextMetrics(ctx, NULL, NULL, &lineh);
-
- state->textAlign = NVG_ALIGN_LEFT | valign;
-
- while ((nrows = nvgTextBreakLines(ctx, string, end, breakRowWidth, rows, 2))) {
- for (i = 0; i < nrows; i++) {
- struct NVGtextRow* row = &rows[i];
- if (haling & NVG_ALIGN_LEFT)
- nvgText(ctx, x, y, row->start, row->end);
- else if (haling & NVG_ALIGN_CENTER)
- nvgText(ctx, x + breakRowWidth*0.5f - row->width*0.5f, y, row->start, row->end);
- else if (haling & NVG_ALIGN_RIGHT)
- nvgText(ctx, x + breakRowWidth - row->width, y, row->start, row->end);
- y += lineh * state->lineHeight;
- }
- string = rows[nrows-1].next;
- }
-
- state->textAlign = oldAlign;
-}
-
-int nvgTextGlyphPositions(struct NVGcontext* ctx, float x, float y, const char* string, const char* end, struct NVGglyphPosition* positions, int maxPositions)
-{
- struct NVGstate* state = nvg__getState(ctx);
- float scale = nvg__getFontScale(state) * ctx->devicePxRatio;
- float invscale = 1.0f / scale;
- struct FONStextIter iter;
- struct FONSquad q;
- int npos = 0;
-
- if (state->fontId == FONS_INVALID) return 0;
-
- if (end == NULL)
- end = string + strlen(string);
-
- if (string == end)
- return 0;
-
- fonsSetSize(ctx->fs, state->fontSize*scale);
- fonsSetSpacing(ctx->fs, state->letterSpacing*scale);
- fonsSetBlur(ctx->fs, state->fontBlur*scale);
- fonsSetAlign(ctx->fs, state->textAlign);
- fonsSetFont(ctx->fs, state->fontId);
-
- fonsTextIterInit(ctx->fs, &iter, x*scale, y*scale, string, end);
- while (fonsTextIterNext(ctx->fs, &iter, &q)) {
- positions[npos].str = iter.str;
- positions[npos].x = iter.x * invscale;
- positions[npos].minx = q.x0 * invscale;
- positions[npos].maxx = q.x1 * invscale;
- npos++;
- if (npos >= maxPositions)
- break;
- }
-
- return npos;
-}
-
-enum NVGcodepointType {
- NVG_SPACE,
- NVG_NEWLINE,
- NVG_CHAR,
-};
-
-int nvgTextBreakLines(struct NVGcontext* ctx, const char* string, const char* end, float breakRowWidth, struct NVGtextRow* rows, int maxRows)
-{
- struct NVGstate* state = nvg__getState(ctx);
- float scale = nvg__getFontScale(state) * ctx->devicePxRatio;
- float invscale = 1.0f / scale;
- struct FONStextIter iter;
- struct FONSquad q;
- int nrows = 0;
- float rowStartX = 0;
- float rowWidth = 0;
- float rowMinX = 0;
- float rowMaxX = 0;
- const char* rowStart = NULL;
- const char* rowEnd = NULL;
- const char* wordStart = NULL;
- float wordStartX = 0;
- float wordMinX = 0;
- const char* breakEnd = NULL;
- float breakWidth = 0;
- float breakMaxX = 0;
- int type = NVG_SPACE, ptype = NVG_SPACE;
- unsigned int pcodepoint = 0;
-
- if (maxRows == 0) return 0;
- if (state->fontId == FONS_INVALID) return 0;
-
- if (end == NULL)
- end = string + strlen(string);
-
- if (string == end) return 0;
-
- fonsSetSize(ctx->fs, state->fontSize*scale);
- fonsSetSpacing(ctx->fs, state->letterSpacing*scale);
- fonsSetBlur(ctx->fs, state->fontBlur*scale);
- fonsSetAlign(ctx->fs, state->textAlign);
- fonsSetFont(ctx->fs, state->fontId);
-
- breakRowWidth *= scale;
-
- fonsTextIterInit(ctx->fs, &iter, 0, 0, string, end);
- while (fonsTextIterNext(ctx->fs, &iter, &q)) {
- switch (iter.codepoint) {
- case 9: // \t
- case 11: // \v
- case 12: // \f
- case 32: // space
- case 0x00a0: // NBSP
- type = NVG_SPACE;
- break;
- case 10: // \n
- type = pcodepoint == 13 ? NVG_SPACE : NVG_NEWLINE;
- break;
- case 13: // \r
- type = pcodepoint == 10 ? NVG_SPACE : NVG_NEWLINE;
- break;
- case 0x0085: // NEL
- type = NVG_NEWLINE;
- break;
- default:
- type = NVG_CHAR;
- break;
- }
-
- if (type == NVG_NEWLINE) {
- // Always handle new lines.
- rows[nrows].start = rowStart != NULL ? rowStart : iter.str;
- rows[nrows].end = rowEnd != NULL ? rowEnd : iter.str;
- rows[nrows].width = rowWidth * invscale;
- rows[nrows].minx = rowMinX * invscale;
- rows[nrows].maxx = rowMaxX * invscale;
- rows[nrows].next = iter.next;
- nrows++;
- if (nrows >= maxRows)
- return nrows;
- // Set null break point
- breakEnd = rowStart;
- breakWidth = 0.0;
- breakMaxX = 0.0;
- // Indicate to skip the white space at the beginning of the row.
- rowStart = NULL;
- rowEnd = NULL;
- rowWidth = 0;
- rowMinX = rowMaxX = 0;
- } else {
- if (rowStart == NULL) {
- // Skip white space until the beginning of the line
- if (type == NVG_CHAR) {
- // The current char is the row so far
- rowStartX = iter.x;
- rowStart = iter.str;
- rowEnd = iter.next;
- rowWidth = iter.nextx - rowStartX; // q.x1 - rowStartX;
- rowMinX = q.x0 - rowStartX;
- rowMaxX = q.x1 - rowStartX;
- wordStart = iter.str;
- wordStartX = iter.x;
- wordMinX = q.x0 - rowStartX;
- // Set null break point
- breakEnd = rowStart;
- breakWidth = 0.0;
- breakMaxX = 0.0;
- }
- } else {
- float nextWidth = iter.nextx - rowStartX; //q.x1 - rowStartX;
-
- if (nextWidth > breakRowWidth) {
- // The run length is too long, need to break to new line.
- if (breakEnd == rowStart) {
- // The current word is longer than the row length, just break it from here.
- rows[nrows].start = rowStart;
- rows[nrows].end = iter.str;
- rows[nrows].width = rowWidth * invscale;
- rows[nrows].minx = rowMinX * invscale;
- rows[nrows].maxx = rowMaxX * invscale;
- rows[nrows].next = iter.str;
- nrows++;
- if (nrows >= maxRows)
- return nrows;
- rowStartX = iter.x;
- rowStart = iter.str;
- rowEnd = iter.next;
- rowWidth = iter.nextx - rowStartX;
- rowMinX = q.x0 - rowStartX;
- rowMaxX = q.x1 - rowStartX;
- wordStart = iter.str;
- wordStartX = iter.x;
- wordMinX = q.x0 - rowStartX;
- } else {
- // Break the line from the end of the last word, and start new line from the begining of the new.
- rows[nrows].start = rowStart;
- rows[nrows].end = breakEnd;
- rows[nrows].width = breakWidth * invscale;
- rows[nrows].minx = rowMinX * invscale;
- rows[nrows].maxx = breakMaxX * invscale;
- rows[nrows].next = wordStart;
- nrows++;
- if (nrows >= maxRows)
- return nrows;
- rowStartX = wordStartX;
- rowStart = wordStart;
- rowEnd = iter.next;
- rowWidth = iter.nextx - rowStartX; // q.x1 - rowStartX;
- rowMinX = wordMinX;
- rowMaxX = q.x1 - rowStartX;
- // No change to the word start
- }
- // Set null break point
- breakEnd = rowStart;
- breakWidth = 0.0;
- breakMaxX = 0.0;
- }
-
- // track last non-white space character
- if (type == NVG_CHAR) {
- rowEnd = iter.next;
- rowWidth = iter.nextx - rowStartX; // q.x1 - rowStartX;
- rowMaxX = q.x1 - rowStartX;
- }
- // track last end of a word
- if (ptype == NVG_CHAR && (type == NVG_SPACE || type == NVG_SPACE)) {
- breakEnd = iter.str;
- breakWidth = rowWidth;
- breakMaxX = rowMaxX;
- }
- // track last beginning of a word
- if ((ptype == NVG_SPACE || ptype == NVG_SPACE) && type == NVG_CHAR) {
- wordStart = iter.str;
- wordStartX = iter.x;
- wordMinX = q.x0 - rowStartX;
- }
- }
- }
-
- pcodepoint = iter.codepoint;
- ptype = type;
- }
-
- // Break the line from the end of the last word, and start new line from the begining of the new.
- if (rowStart != NULL) {
- rows[nrows].start = rowStart;
- rows[nrows].end = rowEnd;
- rows[nrows].width = rowWidth * invscale;
- rows[nrows].minx = rowMinX * invscale;
- rows[nrows].maxx = rowMaxX * invscale;
- rows[nrows].next = end;
- nrows++;
- }
-
- return nrows;
-}
-
-float nvgTextBounds(struct NVGcontext* ctx, float x, float y, const char* string, const char* end, float* bounds)
-{
- struct NVGstate* state = nvg__getState(ctx);
- float scale = nvg__getFontScale(state) * ctx->devicePxRatio;
- float invscale = 1.0f / scale;
- float width;
-
- if (state->fontId == FONS_INVALID) return 0;
-
- fonsSetSize(ctx->fs, state->fontSize*scale);
- fonsSetSpacing(ctx->fs, state->letterSpacing*scale);
- fonsSetBlur(ctx->fs, state->fontBlur*scale);
- fonsSetAlign(ctx->fs, state->textAlign);
- fonsSetFont(ctx->fs, state->fontId);
-
- width = fonsTextBounds(ctx->fs, x, y, string, end, bounds);
- if (bounds != NULL) {
- bounds[0] *= invscale;
- bounds[1] *= invscale;
- bounds[2] *= invscale;
- bounds[3] *= invscale;
- }
- return width * invscale;
-}
-
-void nvgTextBoxBounds(struct NVGcontext* ctx, float x, float y, float breakRowWidth, const char* string, const char* end, float* bounds)
-{
- struct NVGstate* state = nvg__getState(ctx);
- struct NVGtextRow rows[2];
- float scale = nvg__getFontScale(state) * ctx->devicePxRatio;
- float invscale = 1.0f / scale;
- int nrows = 0, i;
- int oldAlign = state->textAlign;
- int haling = state->textAlign & (NVG_ALIGN_LEFT | NVG_ALIGN_CENTER | NVG_ALIGN_RIGHT);
- int valign = state->textAlign & (NVG_ALIGN_TOP | NVG_ALIGN_MIDDLE | NVG_ALIGN_BOTTOM | NVG_ALIGN_BASELINE);
- float lineh = 0, rminy = 0, rmaxy = 0;
- float minx, miny, maxx, maxy;
-
- if (state->fontId == FONS_INVALID) {
- if (bounds != NULL)
- bounds[0] = bounds[1] = bounds[2] = bounds[3] = 0.0f;
- return;
- }
-
- nvgTextMetrics(ctx, NULL, NULL, &lineh);
-
- nvgTextMetrics(ctx, NULL, NULL, &lineh);
-
- state->textAlign = NVG_ALIGN_LEFT | valign;
-
- minx = maxx = x;
- miny = maxy = y;
-
- fonsSetSize(ctx->fs, state->fontSize*scale);
- fonsSetSpacing(ctx->fs, state->letterSpacing*scale);
- fonsSetBlur(ctx->fs, state->fontBlur*scale);
- fonsSetAlign(ctx->fs, state->textAlign);
- fonsSetFont(ctx->fs, state->fontId);
- fonsLineBounds(ctx->fs, 0, &rminy, &rmaxy);
- rminy *= invscale;
- rmaxy *= invscale;
-
- while ((nrows = nvgTextBreakLines(ctx, string, end, breakRowWidth, rows, 2))) {
- for (i = 0; i < nrows; i++) {
- struct NVGtextRow* row = &rows[i];
- float rminx, rmaxx, dx = 0;
- // Horizontal bounds
- if (haling & NVG_ALIGN_LEFT)
- dx = 0;
- else if (haling & NVG_ALIGN_CENTER)
- dx = breakRowWidth*0.5f - row->width*0.5f;
- else if (haling & NVG_ALIGN_RIGHT)
- dx = breakRowWidth - row->width;
- rminx = x + row->minx + dx;
- rmaxx = x + row->maxx + dx;
- minx = nvg__minf(minx, rminx);
- maxx = nvg__maxf(maxx, rmaxx);
- // Vertical bounds.
- miny = nvg__minf(miny, y + rminy);
- maxy = nvg__maxf(maxy, y + rmaxy);
-
- y += lineh * state->lineHeight;
- }
- string = rows[nrows-1].next;
- }
-
- state->textAlign = oldAlign;
-
- if (bounds != NULL) {
- bounds[0] = minx;
- bounds[1] = miny;
- bounds[2] = maxx;
- bounds[3] = maxy;
- }
-}
-
-void nvgTextMetrics(struct NVGcontext* ctx, float* ascender, float* descender, float* lineh)
-{
- struct NVGstate* state = nvg__getState(ctx);
- float scale = nvg__getFontScale(state) * ctx->devicePxRatio;
- float invscale = 1.0f / scale;
-
- if (state->fontId == FONS_INVALID) return;
-
- fonsSetSize(ctx->fs, state->fontSize*scale);
- fonsSetSpacing(ctx->fs, state->letterSpacing*scale);
- fonsSetBlur(ctx->fs, state->fontBlur*scale);
- fonsSetAlign(ctx->fs, state->textAlign);
- fonsSetFont(ctx->fs, state->fontId);
-
- fonsVertMetrics(ctx->fs, ascender, descender, lineh);
- if (ascender != NULL)
- *ascender *= invscale;
- if (descender != NULL)
- *descender *= invscale;
- if (lineh != NULL)
- *lineh *= invscale;
-}
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-25 10:53:08 +0000