copypix.h File Reference

#include "types.h"

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Functions
void	gl_CopyPixels (GLcontext *ctx, GLint srcx, GLint srcy, GLsizei width, GLsizei height, GLenum type)

Function Documentation

gl_CopyPixels()

void gl_CopyPixels	(	GLcontext *	ctx,
		GLint	srcx,
		GLint	srcy,
		GLsizei	width,
		GLsizei	height,
		GLenum	type
	)

Definition at line 454 of file copypix.c.

{
   GLint destx, desty;
 
   if (INSIDE_BEGIN_END(ctx)) {
      gl_error( ctx, GL_INVALID_OPERATION, "glCopyPixels" );
      return;
   }
 
   if (width<0 || height<0) {
      gl_error( ctx, GL_INVALID_VALUE, "glCopyPixels" );
      return;
   }
 
   if (ctx->NewState) {
      gl_update_state(ctx);
   }
 
   if (ctx->RenderMode==GL_RENDER) {
      /* Destination of copy: */
      if (!ctx->Current.RasterPosValid) {
     return;
      }
      destx = (GLint) (ctx->Current.RasterPos[0] + 0.5F);
      desty = (GLint) (ctx->Current.RasterPos[1] + 0.5F);
 
      if (type==GL_COLOR && ctx->Visual->RGBAflag) {
         copy_rgb_pixels( ctx, srcx, srcy, width, height, destx, desty );
      }
      else if (type==GL_COLOR && !ctx->Visual->RGBAflag) {
         copy_ci_pixels( ctx, srcx, srcy, width, height, destx, desty );
      }
      else if (type==GL_DEPTH) {
         copy_depth_pixels( ctx, srcx, srcy, width, height, destx, desty );
      }
      else if (type==GL_STENCIL) {
         copy_stencil_pixels( ctx, srcx, srcy, width, height, destx, desty );
      }
      else {
     gl_error( ctx, GL_INVALID_ENUM, "glCopyPixels" );
      }
   }
   else if (ctx->RenderMode==GL_FEEDBACK) {
      GLfloat color[4];
      color[0] = ctx->Current.ByteColor[0] * ctx->Visual->InvRedScale;
      color[1] = ctx->Current.ByteColor[1] * ctx->Visual->InvGreenScale;
      color[2] = ctx->Current.ByteColor[2] * ctx->Visual->InvBlueScale;
      color[3] = ctx->Current.ByteColor[3] * ctx->Visual->InvAlphaScale;
      FEEDBACK_TOKEN( ctx, (GLfloat) (GLint) GL_COPY_PIXEL_TOKEN );
      gl_feedback_vertex( ctx, ctx->Current.RasterPos[0],
              ctx->Current.RasterPos[1],
              ctx->Current.RasterPos[2],
              ctx->Current.RasterPos[3],
              color, ctx->Current.Index,
              ctx->Current.TexCoord );
   }
   else if (ctx->RenderMode==GL_SELECT) {
      gl_update_hitflag( ctx, ctx->Current.RasterPos[2] );
   }
 
}

Referenced by execute_list(), and init_exec_pointers().