readpix.h File Reference

#include "types.h"

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Functions
void	gl_ReadPixels (GLcontext *ctx, GLint x, GLint y, GLsizei width, GLsizei height, GLenum format, GLenum type, GLvoid *pixels)

Function Documentation

gl_ReadPixels()

void gl_ReadPixels	(	GLcontext *	ctx,
		GLint	x,
		GLint	y,
		GLsizei	width,
		GLsizei	height,
		GLenum	format,
		GLenum	type,
		GLvoid *	pixels
	)

Definition at line 1059 of file readpix.c.

{
    if (INSIDE_BEGIN_END(ctx))
    {
        gl_error(ctx, GL_INVALID_OPERATION, "glReadPixels");
        return;
    }
 
    (void) (*ctx->Driver.SetBuffer)(ctx, ctx->Pixel.ReadBuffer);
 
    switch (format)
    {
    case GL_COLOR_INDEX:
        read_index_pixels(ctx, x, y, width, height, type, pixels);
        break;
    case GL_STENCIL_INDEX:
        read_stencil_pixels(ctx, x, y, width, height, type, pixels);
        break;
    case GL_DEPTH_COMPONENT:
        read_depth_pixels(ctx, x, y, width, height, type, pixels);
        break;
    case GL_RED:
    case GL_GREEN:
    case GL_BLUE:
    case GL_ALPHA:
    case GL_RGB:
    case GL_BGR_EXT:
    case GL_LUMINANCE:
    case GL_LUMINANCE_ALPHA:
    case GL_RGBA:
    case GL_BGRA_EXT:
        read_color_pixels(ctx, x, y, width, height, format, type, pixels);
        break;
    default:
        gl_error(ctx, GL_INVALID_ENUM, "glReadPixels(format)");
    }
 
    (void) (*ctx->Driver.SetBuffer)(ctx, ctx->Color.DrawBuffer);
}

Referenced by init_dlist_pointers(), and init_exec_pointers().