fa546af28f
Without resources, it makes no sense anymore to keep these in separate subdirectories: unixutil* is shared between Cocoa and GTK ports, and gloffscreen* should be shared between all ports (but it's still platform-specific).
37 lines
1.2 KiB
C++
37 lines
1.2 KiB
C++
//-----------------------------------------------------------------------------
|
|
// Offscreen rendering in OpenGL using framebuffer objects.
|
|
//
|
|
// Copyright 2015 <whitequark@whitequark.org>
|
|
//-----------------------------------------------------------------------------
|
|
#ifndef __GLOFFSCREEN_H
|
|
#define __GLOFFSCREEN_H
|
|
|
|
#include <stdint.h>
|
|
|
|
class GLOffscreen {
|
|
public:
|
|
/* these allocate and deallocate OpenGL resources.
|
|
an OpenGL context /must/ be current. */
|
|
GLOffscreen();
|
|
~GLOffscreen();
|
|
|
|
/* prepare for drawing a frame of specified size.
|
|
returns true if OpenGL likes our configuration, false
|
|
otherwise. if it returns false, the OpenGL state is restored. */
|
|
bool begin(int width, int height);
|
|
|
|
/* get pixels out of the frame and restore OpenGL state.
|
|
the pixel format is ARGB32 with top row at index 0 if
|
|
flip is true and bottom row at index 0 if flip is false.
|
|
the returned array is valid until the next call to begin() */
|
|
uint8_t *end(bool flip = true);
|
|
|
|
private:
|
|
unsigned int _framebuffer;
|
|
unsigned int _color_renderbuffer, _depth_renderbuffer;
|
|
uint32_t *_pixels, *_pixels_inv;
|
|
int _width, _height;
|
|
};
|
|
|
|
#endif
|