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/* This file is part of Owl.
*
* Copyright © 2019-2021 Sergey Bugaev <bugaevc@gmail.com>
*
* Owl 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 3 of the License,
* or (at your option) any later version.
*
* Owl 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 Owl. If not, see <http://www.gnu.org/licenses/>.
*/
#import "OwlFeatures.h"
#ifdef OWL_PLATFORM_APPLE
#import "OwlIOSurfaceBuffer.h"
#import <OpenGL/gl.h>
#import <OpenGL/CGLIOSurface.h>
@implementation OwlIOSurfaceBuffer
- (id) initWithResource: (struct wl_resource *) resource
surfacePort: (mach_port_t) surfacePort
{
self = [super initWithResource: resource];
_surface = IOSurfaceLookupFromMachPort(surfacePort);
return self;
}
- (void) dealloc {
IOSurfaceDecrementUseCount(_surface);
[super dealloc];
}
- (void) invalidate {
// ???
}
- (NSSize) size {
size_t width = IOSurfaceGetWidth(_surface);
size_t height = IOSurfaceGetHeight(_surface);
return NSMakeSize(width, height);
}
- (BOOL) needsGLForRendering {
return YES;
}
- (void) setupTextureWithCGLContext: (CGLContextObj) context {
glGenTextures(1, &_tex);
glBindTexture(GL_TEXTURE_RECTANGLE_ARB, _tex);
size_t width = IOSurfaceGetWidth(_surface);
size_t height = IOSurfaceGetHeight(_surface);
CGLTexImageIOSurface2D(
context,
GL_TEXTURE_RECTANGLE_ARB, // target
GL_RGBA, // internal_format
width,
height,
GL_BGRA, // format
GL_UNSIGNED_INT_8_8_8_8_REV, // type
_surface,
0 // plane
);
glTexParameteri(
GL_TEXTURE_RECTANGLE_ARB,
GL_TEXTURE_MIN_FILTER,
GL_LINEAR
);
glTexParameteri(
GL_TEXTURE_RECTANGLE_ARB,
GL_TEXTURE_MAG_FILTER,
GL_LINEAR
);
glTexParameteri(
GL_TEXTURE_RECTANGLE_ARB,
GL_TEXTURE_WRAP_S,
GL_CLAMP_TO_EDGE
);
glTexParameteri(
GL_TEXTURE_RECTANGLE_ARB,
GL_TEXTURE_WRAP_T,
GL_CLAMP_TO_EDGE
);
}
- (void) drawInRect: (NSRect) rect {
glViewport(0, 0, rect.size.width, rect.size.height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(0, rect.size.width, 0, rect.size.height, -1, 1);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
struct {
GLfloat x, y;
} coord[4] = {
{0, 0},
{rect.size.width, 0},
{0, rect.size.height},
{rect.size.width, rect.size.height}
};
glEnable(GL_TEXTURE_RECTANGLE_ARB);
NSOpenGLContext *currentContext = [NSOpenGLContext currentContext];
[self setupTextureWithCGLContext: [currentContext CGLContextObj]];
glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glPushMatrix();
glTexCoordPointer(2, GL_FLOAT, 0, coord);
glVertexPointer(2, GL_FLOAT, 0, coord);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
glPopMatrix();
glFlush();
}
- (void) notifyDetached {
[self sendRelease];
}
@end
#endif /* OWL_PLATFORM_APPLE */
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