drawpix.h File Reference

#include "types.h"

Include dependency graph for drawpix.h:

This graph shows which files directly or indirectly include this file:

Go to the source code of this file.

Functions
void	gl_DrawPixels (GLcontext *ctx, GLsizei width, GLsizei height, GLenum format, GLenum type, const GLvoid *pixels)

Function Documentation

gl_DrawPixels()

void gl_DrawPixels	(	GLcontext *	ctx,
		GLsizei	width,
		GLsizei	height,
		GLenum	format,
		GLenum	type,
		const GLvoid *	pixels
	)

Definition at line 1145 of file drawpix.c.

{
   GLvoid *image;
 
   if (width<0 || height<0) {
      gl_error( ctx, GL_INVALID_VALUE, "glDrawPixels" );
      return;
   }
 
   if (ctx->NewState) {
      gl_update_state(ctx);
   }
 
   /* Let the device driver take a crack at glDrawPixels */
   if (!ctx->CompileFlag && ctx->Driver.DrawPixels) {
      GLint x = (GLint) (ctx->Current.RasterPos[0] + 0.5F);
      GLint y = (GLint) (ctx->Current.RasterPos[1] + 0.5F);
      if ((*ctx->Driver.DrawPixels)( ctx, x, y, width, height,
                                      format, type, GL_FALSE, pixels )) {
         /* Device driver did the job */
         return;
      }
   }
 
   if (format==GL_RGB && type==GL_UNSIGNED_BYTE && ctx->FastDrawPixels
       && !ctx->CompileFlag && ctx->RenderMode==GL_RENDER
       && ctx->RasterMask==0 && ctx->CallDepth==0) {
      /* optimized path */
      if (quickdraw_rgb( ctx, width, height, pixels )) {
         /* success */
         return;
      }
   }
 
   /* take the general path */
 
   /* THIS IS A REAL HACK - FIX IN MESA 2.5
    * If we're inside glCallList then we don't have to unpack the pixels again.
    */
   if (ctx->CallDepth == 0) {
      image = gl_unpack_pixels( ctx, width, height, format, type, pixels );
      if (!image) {
         gl_error( ctx, GL_OUT_OF_MEMORY, "glDrawPixels" );
         return;
      }
   }
   else {
      image = (GLvoid *) pixels;
   }
 
   if (ctx->CompileFlag) {
      gl_save_DrawPixels( ctx, width, height, format, type, image );
   }
   if (ctx->ExecuteFlag) {
      drawpixels( ctx, width, height, format, type, image );
      if (!ctx->CompileFlag) {
         /* may discard unpacked image now */
         if (image!=pixels)
            free( image );
      }
   }
}

Referenced by execute_list(), init_dlist_pointers(), and init_exec_pointers().