/*
* Mesa 3-D graphics library
*
* Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
/**
* \file pixelstore.c
* glPixelStore functions.
*/
#include "glheader.h"
#include "bufferobj.h"
#include "context.h"
#include "pixelstore.h"
#include "mtypes.h"
void GLAPIENTRY
_mesa_PixelStorei( GLenum pname, GLint param )
{
/* NOTE: this call can't be compiled into the display list */
GET_CURRENT_CONTEXT(ctx);
switch (pname) {
case GL_PACK_SWAP_BYTES:
if (!_mesa_is_desktop_gl(ctx))
goto invalid_enum_error;
if (param == (GLint)ctx->Pack.SwapBytes)
return;
ctx->Pack.SwapBytes = param ? GL_TRUE : GL_FALSE;
break;
case GL_PACK_LSB_FIRST:
if (!_mesa_is_desktop_gl(ctx))
goto invalid_enum_error;
if (param == (GLint)ctx->Pack.LsbFirst)
return;
ctx->Pack.LsbFirst = param ? GL_TRUE : GL_FALSE;
break;
case GL_PACK_ROW_LENGTH:
if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
goto invalid_enum_error;
if (param<0) {
_mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
return;
}
if (ctx->Pack.RowLength == param)
return;
ctx->Pack.RowLength = param;
break;
case GL_PACK_IMAGE_HEIGHT:
if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
goto invalid_enum_error;
if (param<0) {
_mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
return;
}
if (ctx->Pack.ImageHeight == param)
return;
ctx->Pack.ImageHeight = param;
break;
case GL_PACK_SKIP_PIXELS:
if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
goto invalid_enum_error;
if (param<0) {
_mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
return;
}
if (ctx->Pack.SkipPixels == param)
return;
ctx->Pack.SkipPixels = param;
break;
case GL_PACK_SKIP_ROWS:
if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
goto invalid_enum_error;
if (param<0) {
_mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
return;
}
if (ctx->Pack.SkipRows == param)
return;
ctx->Pack.SkipRows = param;
break;
case GL_PACK_SKIP_IMAGES:
if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
goto invalid_enum_error;
if (param<0) {
_mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
return;
}
if (ctx->Pack.SkipImages == param)
return;
ctx->Pack.SkipImages = param;
break;
case GL_PACK_ALIGNMENT:
if (param!=1 && param!=2 && param!=4 && param!=8) {
_mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
return;
}
if (ctx->Pack.Alignment == param)
return;
ctx->Pack.Alignment = param;
break;
case GL_PACK_INVERT_MESA:
if (!_mesa_is_desktop_gl(ctx))
goto invalid_enum_error;
if (!ctx->Extensions.MESA_pack_invert) {
_mesa_error( ctx, GL_INVALID_ENUM, "glPixelstore(pname)" );
return;
}
if (ctx->Pack.Invert == param)
return;
ctx->Pack.Invert = param;
break;
case GL_UNPACK_SWAP_BYTES:
if (!_mesa_is_desktop_gl(ctx))
goto invalid_enum_error;
if (param == (GLint)ctx->Unpack.SwapBytes)
return;
if ((GLint)ctx->Unpack.SwapBytes == param)
return;
ctx->Unpack.SwapBytes = param ? GL_TRUE : GL_FALSE;
break;
case GL_UNPACK_LSB_FIRST:
if (!_mesa_is_desktop_gl(ctx))
goto invalid_enum_error;
if (param == (GLint)ctx->Unpack.LsbFirst)
return;
if ((GLint)ctx->Unpack.LsbFirst == param)
return;
ctx->Unpack.LsbFirst = param ? GL_TRUE : GL_FALSE;
break;
case GL_UNPACK_ROW_LENGTH:
if (ctx->API == API_OPENGLES)
goto invalid_enum_error;
if (param<0) {
_mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
return;
}
if (ctx->Unpack.RowLength == param)
return;
ctx->Unpack.RowLength = param;
break;
case GL_UNPACK_IMAGE_HEIGHT:
if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
goto invalid_enum_error;
if (param<0) {
_mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
return;
}
if (ctx->Unpack.ImageHeight == param)
return;
ctx->Unpack.ImageHeight = param;
break;
case GL_UNPACK_SKIP_PIXELS:
if (ctx->API == API_OPENGLES)
goto invalid_enum_error;
if (param<0) {
_mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
return;
}
if (ctx->Unpack.SkipPixels == param)
return;
ctx->Unpack.SkipPixels = param;
break;
case GL_UNPACK_SKIP_ROWS:
if (ctx->API == API_OPENGLES)
goto invalid_enum_error;
if (param<0) {
_mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
return;
}
if (ctx->Unpack.SkipRows == param)
return;
ctx->Unpack.SkipRows = param;
break;
case GL_UNPACK_SKIP_IMAGES:
if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
goto invalid_enum_error;
if (param < 0) {
_mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
return;
}
if (ctx->Unpack.SkipImages == param)
return;
ctx->Unpack.SkipImages = param;
break;
case GL_UNPACK_ALIGNMENT:
if (param!=1 && param!=2 && param!=4 && param!=8) {
_mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore" );
return;
}
if (ctx->Unpack.Alignment == param)
return;
ctx->Unpack.Alignment = param;
break;
default:
goto invalid_enum_error;
}
return;
invalid_enum_error:
_mesa_error( ctx, GL_INVALID_ENUM, "glPixelStore" );
return;
}
void GLAPIENTRY
_mesa_PixelStoref( GLenum pname, GLfloat param )
{
_mesa_PixelStorei( pname, IROUND(param) );
}
/**
* Initialize the context's pixel store state.
*/
void
_mesa_init_pixelstore( struct gl_context *ctx )
{
/* Pixel transfer */
ctx->Pack.Alignment = 4;
ctx->Pack.RowLength = 0;
ctx->Pack.ImageHeight = 0;
ctx->Pack.SkipPixels = 0;
ctx->Pack.SkipRows = 0;
ctx->Pack.SkipImages = 0;
ctx->Pack.SwapBytes = GL_FALSE;
ctx->Pack.LsbFirst = GL_FALSE;
ctx->Pack.Invert = GL_FALSE;
_mesa_reference_buffer_object(ctx, &ctx->Pack.BufferObj,
ctx->Shared->NullBufferObj);
ctx->Unpack.Alignment = 4;
ctx->Unpack.RowLength = 0;
ctx->Unpack.ImageHeight = 0;
ctx->Unpack.SkipPixels = 0;
ctx->Unpack.SkipRows = 0;
ctx->Unpack.SkipImages = 0;
ctx->Unpack.SwapBytes = GL_FALSE;
ctx->Unpack.LsbFirst = GL_FALSE;
ctx->Unpack.Invert = GL_FALSE;
_mesa_reference_buffer_object(ctx, &ctx->Unpack.BufferObj,
ctx->Shared->NullBufferObj);
/*
* _mesa_unpack_image() returns image data in this format. When we
* execute image commands (glDrawPixels(), glTexImage(), etc) from
* within display lists we have to be sure to set the current
* unpacking parameters to these values!
*/
ctx->DefaultPacking.Alignment = 1;
ctx->DefaultPacking.RowLength = 0;
ctx->DefaultPacking.SkipPixels = 0;
ctx->DefaultPacking.SkipRows = 0;
ctx->DefaultPacking.ImageHeight = 0;
ctx->DefaultPacking.SkipImages = 0;
ctx->DefaultPacking.SwapBytes = GL_FALSE;
ctx->DefaultPacking.LsbFirst = GL_FALSE;
ctx->DefaultPacking.Invert = GL_FALSE;
_mesa_reference_buffer_object(ctx, &ctx->DefaultPacking.BufferObj,
ctx->Shared->NullBufferObj);
}