| /* |
| * 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; |
| ctx->Pack.SwapBytes = param ? GL_TRUE : GL_FALSE; |
| break; |
| case GL_PACK_LSB_FIRST: |
| if (!_mesa_is_desktop_gl(ctx)) |
| goto invalid_enum_error; |
| 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) |
| goto invalid_value_error; |
| 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) |
| goto invalid_value_error; |
| 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) |
| goto invalid_value_error; |
| 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) |
| goto invalid_value_error; |
| 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) |
| goto invalid_value_error; |
| ctx->Pack.SkipImages = param; |
| break; |
| case GL_PACK_ALIGNMENT: |
| if (param!=1 && param!=2 && param!=4 && param!=8) |
| goto invalid_value_error; |
| ctx->Pack.Alignment = param; |
| break; |
| case GL_PACK_INVERT_MESA: |
| if (!_mesa_is_desktop_gl(ctx) || !ctx->Extensions.MESA_pack_invert) |
| goto invalid_enum_error; |
| ctx->Pack.Invert = param; |
| break; |
| case GL_PACK_COMPRESSED_BLOCK_WIDTH: |
| if (!_mesa_is_desktop_gl(ctx)) |
| goto invalid_enum_error; |
| if (param<0) |
| goto invalid_value_error; |
| ctx->Pack.CompressedBlockWidth = param; |
| break; |
| case GL_PACK_COMPRESSED_BLOCK_HEIGHT: |
| if (!_mesa_is_desktop_gl(ctx)) |
| goto invalid_enum_error; |
| if (param<0) |
| goto invalid_value_error; |
| ctx->Pack.CompressedBlockHeight = param; |
| break; |
| case GL_PACK_COMPRESSED_BLOCK_DEPTH: |
| if (!_mesa_is_desktop_gl(ctx)) |
| goto invalid_enum_error; |
| if (param<0) |
| goto invalid_value_error; |
| ctx->Pack.CompressedBlockDepth = param; |
| break; |
| case GL_PACK_COMPRESSED_BLOCK_SIZE: |
| if (!_mesa_is_desktop_gl(ctx)) |
| goto invalid_enum_error; |
| if (param<0) |
| goto invalid_value_error; |
| ctx->Pack.CompressedBlockSize = param; |
| break; |
| |
| case GL_UNPACK_SWAP_BYTES: |
| if (!_mesa_is_desktop_gl(ctx)) |
| goto invalid_enum_error; |
| ctx->Unpack.SwapBytes = param ? GL_TRUE : GL_FALSE; |
| break; |
| case GL_UNPACK_LSB_FIRST: |
| if (!_mesa_is_desktop_gl(ctx)) |
| goto invalid_enum_error; |
| 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) |
| goto invalid_value_error; |
| 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) |
| goto invalid_value_error; |
| ctx->Unpack.ImageHeight = param; |
| break; |
| case GL_UNPACK_SKIP_PIXELS: |
| if (ctx->API == API_OPENGLES) |
| goto invalid_enum_error; |
| if (param<0) |
| goto invalid_value_error; |
| ctx->Unpack.SkipPixels = param; |
| break; |
| case GL_UNPACK_SKIP_ROWS: |
| if (ctx->API == API_OPENGLES) |
| goto invalid_enum_error; |
| if (param<0) |
| goto invalid_value_error; |
| 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) |
| goto invalid_value_error; |
| ctx->Unpack.SkipImages = param; |
| break; |
| case GL_UNPACK_ALIGNMENT: |
| if (param!=1 && param!=2 && param!=4 && param!=8) |
| goto invalid_value_error; |
| ctx->Unpack.Alignment = param; |
| break; |
| case GL_UNPACK_COMPRESSED_BLOCK_WIDTH: |
| if (!_mesa_is_desktop_gl(ctx)) |
| goto invalid_enum_error; |
| if (param<0) |
| goto invalid_value_error; |
| ctx->Unpack.CompressedBlockWidth = param; |
| break; |
| case GL_UNPACK_COMPRESSED_BLOCK_HEIGHT: |
| if (!_mesa_is_desktop_gl(ctx)) |
| goto invalid_enum_error; |
| if (param<0) |
| goto invalid_value_error; |
| ctx->Unpack.CompressedBlockHeight = param; |
| break; |
| case GL_UNPACK_COMPRESSED_BLOCK_DEPTH: |
| if (!_mesa_is_desktop_gl(ctx)) |
| goto invalid_enum_error; |
| if (param<0) |
| goto invalid_value_error; |
| ctx->Unpack.CompressedBlockDepth = param; |
| break; |
| case GL_UNPACK_COMPRESSED_BLOCK_SIZE: |
| if (!_mesa_is_desktop_gl(ctx)) |
| goto invalid_enum_error; |
| if (param<0) |
| goto invalid_value_error; |
| ctx->Unpack.CompressedBlockSize = param; |
| break; |
| default: |
| goto invalid_enum_error; |
| } |
| |
| return; |
| |
| invalid_enum_error: |
| _mesa_error( ctx, GL_INVALID_ENUM, "glPixelStore" ); |
| return; |
| |
| invalid_value_error: |
| _mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" ); |
| 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; |
| ctx->Pack.CompressedBlockWidth = 0; |
| ctx->Pack.CompressedBlockHeight = 0; |
| ctx->Pack.CompressedBlockDepth = 0; |
| ctx->Pack.CompressedBlockSize = 0; |
| _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; |
| ctx->Unpack.CompressedBlockWidth = 0; |
| ctx->Unpack.CompressedBlockHeight = 0; |
| ctx->Unpack.CompressedBlockDepth = 0; |
| ctx->Unpack.CompressedBlockSize = 0; |
| _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); |
| } |
| |
| |
| /** |
| * Check if the given compressed pixel storage parameters are legal. |
| * Record a GL error if illegal. |
| * \return true if legal, false if illegal |
| */ |
| bool |
| _mesa_compressed_pixel_storage_error_check( |
| struct gl_context *ctx, |
| GLint dimensions, |
| const struct gl_pixelstore_attrib *packing, |
| const char *caller) |
| { |
| if (!_mesa_is_desktop_gl(ctx) || !packing->CompressedBlockSize) |
| return true; |
| |
| if (packing->CompressedBlockWidth && |
| packing->SkipPixels % packing->CompressedBlockWidth) { |
| _mesa_error(ctx, GL_INVALID_OPERATION, |
| "%s(skip-pixels %% block-width)", caller); |
| return false; |
| } |
| |
| if (dimensions > 1 && |
| packing->CompressedBlockHeight && |
| packing->SkipRows % packing->CompressedBlockHeight) { |
| _mesa_error(ctx, GL_INVALID_OPERATION, |
| "%s(skip-rows %% block-height)", caller); |
| return false; |
| } |
| |
| if (dimensions > 2 && |
| packing->CompressedBlockDepth && |
| packing->SkipImages % packing->CompressedBlockDepth) { |
| _mesa_error(ctx, GL_INVALID_OPERATION, |
| "%s(skip-images %% block-depth)", caller); |
| return false; |
| } |
| |
| return true; |
| } |
