diff options
author | Robin Gareus <robin@gareus.org> | 2017-03-19 22:40:58 +0100 |
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committer | Robin Gareus <robin@gareus.org> | 2017-03-19 22:49:17 +0100 |
commit | c371fc511500acada422cdcf93658fc25e5106de (patch) | |
tree | 519d15df59ab94c579beceac57aac348c08de329 /libs/canvas/nsglview.mm | |
parent | 7d41e542fe54feaa24fc87004df2b0276b9941c3 (diff) |
Prepare NSView/OpenGL Canvas (to speed up rendering on [mac]OS[X]
This avoids Coregraphics (cairo_quartz_surface..) competely.
The openGL texture bypasses CG's slow argb_image and CGSColorMask
methods.
Diffstat (limited to 'libs/canvas/nsglview.mm')
-rw-r--r-- | libs/canvas/nsglview.mm | 269 |
1 files changed, 269 insertions, 0 deletions
diff --git a/libs/canvas/nsglview.mm b/libs/canvas/nsglview.mm new file mode 100644 index 0000000000..09d0ae1342 --- /dev/null +++ b/libs/canvas/nsglview.mm @@ -0,0 +1,269 @@ +/* + Copyright (C) 2011 Paul Davis + Copyright (C) 2012 David Robillard <http://drobilla.net> + Copyright (C) 2017 Robin Gareus <robin@gareus.org> + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + +*/ + +/* include order matter due to apple defines */ +#include <gtkmm/window.h> + +#include "canvas/canvas.h" +#include "canvas/utils.h" +#include "canvas/nsglview.h" + +#include <gdk/gdkquartz.h> + +#include <OpenGL/gl.h> +#import <Cocoa/Cocoa.h> + +__attribute__ ((visibility ("hidden"))) +@interface ArdourCanvasOpenGLView : NSOpenGLView +{ +@private + unsigned int _texture_id; + int _width; + int _height; + Cairo::RefPtr<Cairo::ImageSurface> surf; + ArdourCanvas::GtkCanvas *gtkcanvas; +} + +- (id) initWithFrame:(NSRect)frame; +- (void) dealloc; +- (void) set_ardour_canvas:(ArdourCanvas::GtkCanvas*)c; +- (void) reshape; +- (void) drawRect:(NSRect)rect; +- (BOOL) canBecomeKeyWindow:(id)sender; +- (BOOL) acceptsFirstResponder:(id)sender; + +@end + +@implementation ArdourCanvasOpenGLView + +- (id) initWithFrame:(NSRect)frame +{ + NSOpenGLPixelFormatAttribute pixelAttribs[16] = { + NSOpenGLPFADoubleBuffer, + NSOpenGLPFAAccelerated, + NSOpenGLPFAColorSize, 32, + NSOpenGLPFADepthSize, 32, + NSOpenGLPFAMultisample, + NSOpenGLPFASampleBuffers, 1, + NSOpenGLPFASamples, 4, + 0 + }; + + NSOpenGLPixelFormat* pixelFormat = + [[NSOpenGLPixelFormat alloc] initWithAttributes:pixelAttribs]; + + if (pixelFormat) { + self = [super initWithFrame:frame pixelFormat:pixelFormat]; + [pixelFormat release]; + } else { + self = [super initWithFrame:frame]; + } + + _texture_id = 0; + _width = 0; + _height = 0; + + if (self) { + + [[self openGLContext] makeCurrentContext]; + glClearColor (0.0f, 0.0f, 0.0f, 0.0f); + glDisable (GL_DEPTH_TEST); + glEnable (GL_BLEND); + glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); + glEnable (GL_TEXTURE_RECTANGLE_ARB); + [NSOpenGLContext clearCurrentContext]; + + [self reshape]; + } + + return self; +} + +- (void) dealloc { + [[self openGLContext] makeCurrentContext]; + glDeleteTextures (1, &_texture_id); + [NSOpenGLContext clearCurrentContext]; + + [super dealloc]; +} + +- (void) set_ardour_canvas:(ArdourCanvas::GtkCanvas*)c +{ + gtkcanvas = c; +} + +- (BOOL) canBecomeKeyWindow:(id)sender{ + return NO; +} + +- (BOOL) acceptsFirstResponder:(id)sender{ + return NO; +} + +- (void) reshape +{ + [[self openGLContext] update]; + + NSRect bounds = [self bounds]; + int width = bounds.size.width; + int height = bounds.size.height; + + if (_width == width && _height == height) { + return; + } + + [[self openGLContext] makeCurrentContext]; + + glViewport (0, 0, width, height); + glMatrixMode (GL_PROJECTION); + glLoadIdentity (); + glOrtho (-1.0f, 1.0f, -1.0f, 1.0f, -1.0f, 1.0f); + + glClear (GL_COLOR_BUFFER_BIT); + + glDeleteTextures (1, &_texture_id); + glGenTextures (1, &_texture_id); + glBindTexture (GL_TEXTURE_RECTANGLE_ARB, _texture_id); + glTexImage2D (GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA8, + width, height, 0, + GL_BGRA, GL_UNSIGNED_BYTE, NULL); + glTexEnvi (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL); + + glMatrixMode(GL_MODELVIEW); + glLoadIdentity(); + + [NSOpenGLContext clearCurrentContext]; + + _width = width; + _height = height; +} + +- (void) drawRect:(NSRect)rect +{ + [[self openGLContext] makeCurrentContext]; + + glMatrixMode(GL_MODELVIEW); + glLoadIdentity(); + glClear(GL_COLOR_BUFFER_BIT); + + /* call back into GtkCanvas */ + + ArdourCanvas::Rect crect (rect.origin.x, rect.origin.y, + rect.size.width + rect.origin.x, + rect.size.height + rect.origin.y); + + if (!surf || surf->get_width () != _width || surf->get_height() != _height) { + surf = Cairo::ImageSurface::create (Cairo::FORMAT_ARGB32, _width, _height); + + crect.x0 = crect.y0 = 0; + crect.x1 = _width; + crect.y1 = _height; + } + + Cairo::RefPtr<Cairo::Context> ctx = Cairo::Context::create (surf); + + // TODO: check retina screen, scaling factor. + // cairo_surface_get_device_scale () or explicit scale + + ctx->rectangle (crect.x0, crect.y0, crect.width(), crect.height()); + ctx->clip_preserve (); + /* draw background color */ + ArdourCanvas::set_source_rgba (ctx, gtkcanvas->background_color ()); + ctx->fill (); + + gtkcanvas->render (crect, ctx); + + surf->flush (); + uint8_t* imgdata = surf->get_data (); + + /* NOTE for big-endian (PPC), we'd need to flip byte-order + * RGBA <> RGBA for the texture. + * GtkCanvas does not use this nsview for PPC builds, yet + */ + + /* continue OpenGL */ + glPushMatrix (); + + glEnable(GL_TEXTURE_2D); + glBindTexture(GL_TEXTURE_RECTANGLE_ARB, _texture_id); + glTexImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA8, + _width, _height, /*border*/ 0, + GL_BGRA, GL_UNSIGNED_BYTE, imgdata); + + glBegin(GL_QUADS); + glTexCoord2f( 0.0f, (GLfloat) _height); + glVertex2f(-1.0f, -1.0f); + + glTexCoord2f((GLfloat) _width, (GLfloat) _height); + glVertex2f( 1.0f, -1.0f); + + glTexCoord2f((GLfloat) _width, 0.0f); + glVertex2f( 1.0f, 1.0f); + + glTexCoord2f( 0.0f, 0.0f); + glVertex2f(-1.0f, 1.0f); + glEnd(); + + glDisable(GL_TEXTURE_2D); + glPopMatrix(); + + /// + + glFlush(); + glSwapAPPLE(); + [NSOpenGLContext clearCurrentContext]; +} + +@end + + +void* +ArdourCanvas::nsglview_create (GtkCanvas* canvas) +{ + ArdourCanvasOpenGLView* gl_view = [ArdourCanvasOpenGLView new]; + if (!gl_view) { + return 0; + } + [gl_view set_ardour_canvas:canvas]; + return gl_view; +} + +void +ArdourCanvas::nsglview_overlay (void* glv, GdkWindow* window) +{ + ArdourCanvasOpenGLView* gl_view = (ArdourCanvasOpenGLView*) glv; + NSView* view = gdk_quartz_window_get_nsview (window); + [view addSubview:gl_view]; +} + +void +ArdourCanvas::nsglview_resize (void* glv, int x, int y, int w, int h) +{ + ArdourCanvasOpenGLView* gl_view = (ArdourCanvasOpenGLView*) glv; + [gl_view setFrame:NSMakeRect(x, y, w, h)]; +} + +void +ArdourCanvas::nsglview_queue_draw (void* glv, int x, int y, int w, int h) +{ + ArdourCanvasOpenGLView* gl_view = (ArdourCanvasOpenGLView*) glv; + [gl_view setNeedsDisplayInRect:NSMakeRect(x, y, w, h)]; +} |