/* * 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); }