src/mesa/drivers/dri/common/drirenderbuffer.h

   1
   2 /**
   3  * A driRenderbuffer is dervied from gl_renderbuffer.
   4  * It describes a color buffer (front or back), a depth buffer, or stencil
   5  * buffer etc.
   6  * Specific to DRI drivers are the offset and pitch fields.
   7  */
   8
   9
  10 #ifndef DRIRENDERBUFFER_H
  11 #define DRIRENDERBUFFER_H
  12
  13 #include "mtypes.h"
  14
  15 typedef struct {
  16    struct gl_renderbuffer Base;
  17
  18    /* Chars or bytes per pixel.  If Z and Stencil are stored together this
  19     * will typically be 32 whether this a depth or stencil renderbuffer.
  20     */
  21    GLint cpp;
  22
  23    /* Buffer position and pitch (row stride).  Recall that for today's DRI
  24     * drivers, we have statically allocated color/depth/stencil buffers.
  25     * So this information describes the whole screen, not just a window.
  26     * To address pixels in a window, we need to know the window's position
  27     * and size with respect to the screen.
  28     */
  29    GLint offset;  /* in bytes */
  30    GLint pitch;   /* in pixels */
  31
  32 } driRenderbuffer;
  33
  34
  35 driRenderbuffer *
  36 driNewRenderbuffer(GLenum format, GLint cpp, GLint offset, GLint pitch);
  37
  38
  39 #endif /* DRIRENDERBUFFER_H */