mirror of
https://github.com/reactos/reactos.git
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257 lines
7.4 KiB
C
257 lines
7.4 KiB
C
/*
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* Mesa 3-D graphics library
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* Version: 7.1
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*
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* Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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/**
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* \file pixelstore.c
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* glPixelStore functions.
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*/
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#include <precomp.h>
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void GLAPIENTRY
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_mesa_PixelStorei( GLenum pname, GLint param )
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{
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/* NOTE: this call can't be compiled into the display list */
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GET_CURRENT_CONTEXT(ctx);
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ASSERT_OUTSIDE_BEGIN_END(ctx);
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switch (pname) {
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case GL_PACK_SWAP_BYTES:
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if (param == (GLint)ctx->Pack.SwapBytes)
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return;
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FLUSH_VERTICES(ctx, _NEW_PACKUNPACK);
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ctx->Pack.SwapBytes = param ? GL_TRUE : GL_FALSE;
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break;
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case GL_PACK_LSB_FIRST:
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if (param == (GLint)ctx->Pack.LsbFirst)
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return;
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FLUSH_VERTICES(ctx, _NEW_PACKUNPACK);
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ctx->Pack.LsbFirst = param ? GL_TRUE : GL_FALSE;
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break;
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case GL_PACK_ROW_LENGTH:
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if (param<0) {
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_mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
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return;
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}
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if (ctx->Pack.RowLength == param)
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return;
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FLUSH_VERTICES(ctx, _NEW_PACKUNPACK);
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ctx->Pack.RowLength = param;
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break;
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case GL_PACK_IMAGE_HEIGHT:
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if (param<0) {
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_mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
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return;
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}
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if (ctx->Pack.ImageHeight == param)
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return;
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FLUSH_VERTICES(ctx, _NEW_PACKUNPACK);
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ctx->Pack.ImageHeight = param;
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break;
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case GL_PACK_SKIP_PIXELS:
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if (param<0) {
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_mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
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return;
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}
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if (ctx->Pack.SkipPixels == param)
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return;
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FLUSH_VERTICES(ctx, _NEW_PACKUNPACK);
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ctx->Pack.SkipPixels = param;
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break;
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case GL_PACK_SKIP_ROWS:
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if (param<0) {
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_mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
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return;
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}
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if (ctx->Pack.SkipRows == param)
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return;
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FLUSH_VERTICES(ctx, _NEW_PACKUNPACK);
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ctx->Pack.SkipRows = param;
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break;
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case GL_PACK_SKIP_IMAGES:
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if (param<0) {
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_mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
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return;
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}
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if (ctx->Pack.SkipImages == param)
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return;
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FLUSH_VERTICES(ctx, _NEW_PACKUNPACK);
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ctx->Pack.SkipImages = param;
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break;
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case GL_PACK_ALIGNMENT:
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if (param!=1 && param!=2 && param!=4 && param!=8) {
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_mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
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return;
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}
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if (ctx->Pack.Alignment == param)
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return;
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FLUSH_VERTICES(ctx, _NEW_PACKUNPACK);
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ctx->Pack.Alignment = param;
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break;
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case GL_PACK_INVERT_MESA:
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if (!ctx->Extensions.MESA_pack_invert) {
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_mesa_error( ctx, GL_INVALID_ENUM, "glPixelstore(pname)" );
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return;
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}
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if (ctx->Pack.Invert == param)
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return;
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FLUSH_VERTICES(ctx, _NEW_PACKUNPACK);
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ctx->Pack.Invert = param;
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break;
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case GL_UNPACK_SWAP_BYTES:
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if (param == (GLint)ctx->Unpack.SwapBytes)
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return;
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if ((GLint)ctx->Unpack.SwapBytes == param)
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return;
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FLUSH_VERTICES(ctx, _NEW_PACKUNPACK);
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ctx->Unpack.SwapBytes = param ? GL_TRUE : GL_FALSE;
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break;
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case GL_UNPACK_LSB_FIRST:
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if (param == (GLint)ctx->Unpack.LsbFirst)
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return;
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if ((GLint)ctx->Unpack.LsbFirst == param)
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return;
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FLUSH_VERTICES(ctx, _NEW_PACKUNPACK);
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ctx->Unpack.LsbFirst = param ? GL_TRUE : GL_FALSE;
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break;
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case GL_UNPACK_ROW_LENGTH:
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if (param<0) {
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_mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
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return;
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}
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if (ctx->Unpack.RowLength == param)
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return;
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FLUSH_VERTICES(ctx, _NEW_PACKUNPACK);
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ctx->Unpack.RowLength = param;
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break;
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case GL_UNPACK_IMAGE_HEIGHT:
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if (param<0) {
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_mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
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return;
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}
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if (ctx->Unpack.ImageHeight == param)
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return;
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FLUSH_VERTICES(ctx, _NEW_PACKUNPACK);
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ctx->Unpack.ImageHeight = param;
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break;
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case GL_UNPACK_SKIP_PIXELS:
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if (param<0) {
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_mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
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return;
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}
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if (ctx->Unpack.SkipPixels == param)
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return;
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FLUSH_VERTICES(ctx, _NEW_PACKUNPACK);
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ctx->Unpack.SkipPixels = param;
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break;
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case GL_UNPACK_SKIP_ROWS:
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if (param<0) {
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_mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
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return;
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}
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if (ctx->Unpack.SkipRows == param)
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return;
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FLUSH_VERTICES(ctx, _NEW_PACKUNPACK);
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ctx->Unpack.SkipRows = param;
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break;
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case GL_UNPACK_SKIP_IMAGES:
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if (param < 0) {
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_mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
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return;
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}
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if (ctx->Unpack.SkipImages == param)
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return;
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FLUSH_VERTICES(ctx, _NEW_PACKUNPACK);
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ctx->Unpack.SkipImages = param;
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break;
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case GL_UNPACK_ALIGNMENT:
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if (param!=1 && param!=2 && param!=4 && param!=8) {
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_mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore" );
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return;
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}
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if (ctx->Unpack.Alignment == param)
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return;
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FLUSH_VERTICES(ctx, _NEW_PACKUNPACK);
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ctx->Unpack.Alignment = param;
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break;
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default:
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_mesa_error( ctx, GL_INVALID_ENUM, "glPixelStore" );
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return;
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}
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}
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void GLAPIENTRY
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_mesa_PixelStoref( GLenum pname, GLfloat param )
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{
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_mesa_PixelStorei( pname, IROUND(param) );
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}
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/**
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* Initialize the context's pixel store state.
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*/
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void
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_mesa_init_pixelstore( struct gl_context *ctx )
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{
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/* Pixel transfer */
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ctx->Pack.Alignment = 4;
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ctx->Pack.RowLength = 0;
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ctx->Pack.ImageHeight = 0;
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ctx->Pack.SkipPixels = 0;
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ctx->Pack.SkipRows = 0;
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ctx->Pack.SkipImages = 0;
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ctx->Pack.SwapBytes = GL_FALSE;
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ctx->Pack.LsbFirst = GL_FALSE;
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ctx->Pack.Invert = GL_FALSE;
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ctx->Unpack.Alignment = 4;
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ctx->Unpack.RowLength = 0;
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ctx->Unpack.ImageHeight = 0;
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ctx->Unpack.SkipPixels = 0;
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ctx->Unpack.SkipRows = 0;
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ctx->Unpack.SkipImages = 0;
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ctx->Unpack.SwapBytes = GL_FALSE;
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ctx->Unpack.LsbFirst = GL_FALSE;
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ctx->Unpack.Invert = GL_FALSE;
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/*
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* _mesa_unpack_image() returns image data in this format. When we
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* execute image commands (glDrawPixels(), glTexImage(), etc) from
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* within display lists we have to be sure to set the current
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* unpacking parameters to these values!
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*/
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ctx->DefaultPacking.Alignment = 1;
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ctx->DefaultPacking.RowLength = 0;
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ctx->DefaultPacking.SkipPixels = 0;
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ctx->DefaultPacking.SkipRows = 0;
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ctx->DefaultPacking.ImageHeight = 0;
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ctx->DefaultPacking.SkipImages = 0;
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ctx->DefaultPacking.SwapBytes = GL_FALSE;
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ctx->DefaultPacking.LsbFirst = GL_FALSE;
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ctx->DefaultPacking.Invert = GL_FALSE;
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}
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