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* Copyright (C) 2010 Maciej Cencora <m.cencora@gmail.com>
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial
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* portions of the Software.
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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#include "main/bufferobj.h"
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#include "main/enums.h"
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#include "main/image.h"
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#include "main/state.h"
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#include "swrast/swrast.h"
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#include "radeon_buffer_objects.h"
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#include "radeon_common_context.h"
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#include "radeon_debug.h"
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#include "radeon_mipmap_tree.h"
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static gl_format gl_format_and_type_to_mesa_format(GLenum format, GLenum type)
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case GL_UNSIGNED_SHORT_5_6_5:
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return MESA_FORMAT_RGB565;
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case GL_UNSIGNED_SHORT_5_6_5_REV:
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return MESA_FORMAT_RGB565_REV;
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return MESA_FORMAT_RGBA_FLOAT32;
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case GL_UNSIGNED_SHORT_5_5_5_1:
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return MESA_FORMAT_RGBA5551;
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case GL_UNSIGNED_INT_8_8_8_8:
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return MESA_FORMAT_RGBA8888;
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case GL_UNSIGNED_BYTE:
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case GL_UNSIGNED_INT_8_8_8_8_REV:
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return MESA_FORMAT_RGBA8888_REV;
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case GL_UNSIGNED_SHORT_4_4_4_4:
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return MESA_FORMAT_ARGB4444_REV;
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case GL_UNSIGNED_SHORT_4_4_4_4_REV:
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return MESA_FORMAT_ARGB4444;
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case GL_UNSIGNED_SHORT_5_5_5_1:
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return MESA_FORMAT_ARGB1555_REV;
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case GL_UNSIGNED_SHORT_1_5_5_5_REV:
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return MESA_FORMAT_ARGB1555;
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case GL_UNSIGNED_INT_8_8_8_8:
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return MESA_FORMAT_ARGB8888_REV;
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case GL_UNSIGNED_BYTE:
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case GL_UNSIGNED_INT_8_8_8_8_REV:
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return MESA_FORMAT_ARGB8888;
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return MESA_FORMAT_NONE;
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do_blit_readpixels(struct gl_context * ctx,
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GLint x, GLint y, GLsizei width, GLsizei height,
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GLenum format, GLenum type,
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const struct gl_pixelstore_attrib *pack, GLvoid * pixels)
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radeonContextPtr radeon = RADEON_CONTEXT(ctx);
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const struct radeon_renderbuffer *rrb = radeon_renderbuffer(ctx->ReadBuffer->_ColorReadBuffer);
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const gl_format dst_format = gl_format_and_type_to_mesa_format(format, type);
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unsigned dst_rowstride, dst_imagesize, aligned_rowstride, flip_y;
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struct radeon_bo *dst_buffer;
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GLint dst_x = 0, dst_y = 0;
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/* It's not worth if number of pixels to copy is really small */
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if (width * height < 100) {
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if (dst_format == MESA_FORMAT_NONE ||
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!radeon->vtbl.check_blit(dst_format) || !radeon->vtbl.blit) {
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if (ctx->_ImageTransferState || ctx->Color._LogicOpEnabled) {
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if (pack->SwapBytes || pack->LsbFirst) {
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if (pack->RowLength > 0) {
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dst_rowstride = pack->RowLength;
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dst_rowstride = width;
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if (!_mesa_clip_copytexsubimage(ctx, &dst_x, &dst_y, &x, &y, &width, &height)) {
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assert(x >= 0 && y >= 0);
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aligned_rowstride = get_texture_image_row_stride(radeon, dst_format, dst_rowstride, 0);
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dst_rowstride *= _mesa_get_format_bytes(dst_format);
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if (_mesa_is_bufferobj(pack->BufferObj) && aligned_rowstride != dst_rowstride)
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dst_imagesize = get_texture_image_size(dst_format,
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if (!_mesa_is_bufferobj(pack->BufferObj))
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dst_buffer = radeon_bo_open(radeon->radeonScreen->bom, 0, dst_imagesize, 1024, RADEON_GEM_DOMAIN_GTT, 0);
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dst_buffer = get_radeon_buffer_object(pack->BufferObj)->bo;
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dst_offset = (intptr_t)pixels;
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/* Disable source Y flipping for FBOs */
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flip_y = (ctx->ReadBuffer->Name == 0);
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y = rrb->base.Height - height - y;
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if (radeon->vtbl.blit(ctx,
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rrb->pitch / rrb->cpp,
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aligned_rowstride / _mesa_get_format_bytes(dst_format),
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if (!_mesa_is_bufferobj(pack->BufferObj))
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radeon_bo_map(dst_buffer, 0);
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copy_rows(pixels, dst_rowstride, dst_buffer->ptr,
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aligned_rowstride, height, dst_rowstride);
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radeon_bo_unmap(dst_buffer);
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radeon_bo_unref(dst_buffer);
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if (!_mesa_is_bufferobj(pack->BufferObj))
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radeon_bo_unref(dst_buffer);
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radeonReadPixels(struct gl_context * ctx,
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GLint x, GLint y, GLsizei width, GLsizei height,
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GLenum format, GLenum type,
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const struct gl_pixelstore_attrib *pack, GLvoid * pixels)
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radeonContextPtr radeon = RADEON_CONTEXT(ctx);
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radeon_prepare_render(radeon);
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if (do_blit_readpixels(ctx, x, y, width, height, format, type, pack, pixels))
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/* Update Mesa state before calling down into _swrast_ReadPixels, as
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* the spans code requires the computed buffer states to be up to date,
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* but _swrast_ReadPixels only updates Mesa state after setting up
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radeon_print(RADEON_FALLBACKS, RADEON_NORMAL,
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"Falling back to sw for ReadPixels (format %s, type %s)\n",
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_mesa_lookup_enum_by_nr(format), _mesa_lookup_enum_by_nr(type));
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_mesa_update_state(ctx);
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_swrast_ReadPixels(ctx, x, y, width, height, format, type, pack, pixels);