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/*
* Copyright (C) 2010 Maciej Cencora <m.cencora@gmail.com>
*
* 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 (including the
* next paragraph) 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 COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS 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.
*
*/
#include "stdint.h"
#include "main/bufferobj.h"
#include "main/enums.h"
#include "main/image.h"
#include "main/state.h"
#include "swrast/swrast.h"
#include "radeon_common_context.h"
#include "radeon_debug.h"
#include "radeon_mipmap_tree.h"
static gl_format gl_format_and_type_to_mesa_format(GLenum format, GLenum type)
{
switch (format)
{
case GL_RGB:
switch (type) {
case GL_UNSIGNED_SHORT_5_6_5:
return MESA_FORMAT_RGB565;
case GL_UNSIGNED_SHORT_5_6_5_REV:
return MESA_FORMAT_RGB565_REV;
}
break;
case GL_RGBA:
switch (type) {
case GL_FLOAT:
return MESA_FORMAT_RGBA_FLOAT32;
case GL_UNSIGNED_SHORT_5_5_5_1:
return MESA_FORMAT_RGBA5551;
case GL_UNSIGNED_INT_8_8_8_8:
return MESA_FORMAT_RGBA8888;
case GL_UNSIGNED_BYTE:
case GL_UNSIGNED_INT_8_8_8_8_REV:
return MESA_FORMAT_RGBA8888_REV;
}
break;
case GL_BGRA:
switch (type) {
case GL_UNSIGNED_SHORT_4_4_4_4:
return MESA_FORMAT_ARGB4444_REV;
case GL_UNSIGNED_SHORT_4_4_4_4_REV:
return MESA_FORMAT_ARGB4444;
case GL_UNSIGNED_SHORT_5_5_5_1:
return MESA_FORMAT_ARGB1555_REV;
case GL_UNSIGNED_SHORT_1_5_5_5_REV:
return MESA_FORMAT_ARGB1555;
case GL_UNSIGNED_INT_8_8_8_8:
return MESA_FORMAT_ARGB8888_REV;
case GL_UNSIGNED_BYTE:
case GL_UNSIGNED_INT_8_8_8_8_REV:
return MESA_FORMAT_ARGB8888;
}
break;
}
return MESA_FORMAT_NONE;
}
static GLboolean
do_blit_readpixels(GLcontext * ctx,
GLint x, GLint y, GLsizei width, GLsizei height,
GLenum format, GLenum type,
const struct gl_pixelstore_attrib *pack, GLvoid * pixels)
{
radeonContextPtr radeon = RADEON_CONTEXT(ctx);
const struct radeon_renderbuffer *rrb = radeon_renderbuffer(ctx->ReadBuffer->_ColorReadBuffer);
const gl_format dst_format = gl_format_and_type_to_mesa_format(format, type);
unsigned dst_rowstride, dst_imagesize, aligned_rowstride, flip_y;
struct radeon_bo *dst_buffer;
GLint dst_x = 0, dst_y = 0;
/* It's not worth if number of pixels to copy is really small */
if (width * height < 100) {
return GL_FALSE;
}
if (dst_format == MESA_FORMAT_NONE ||
!radeon->vtbl.check_blit(dst_format) || !radeon->vtbl.blit) {
return GL_FALSE;
}
if (ctx->_ImageTransferState || ctx->Color._LogicOpEnabled) {
return GL_FALSE;
}
if (pack->SwapBytes || pack->LsbFirst) {
return GL_FALSE;
}
if (pack->RowLength > 0) {
dst_rowstride = pack->RowLength;
} else {
dst_rowstride = width;
}
if (!_mesa_clip_copytexsubimage(ctx, &dst_x, &dst_y, &x, &y, &width, &height)) {
return GL_TRUE;
}
assert(x >= 0 && y >= 0);
aligned_rowstride = get_texture_image_row_stride(radeon, dst_format, dst_rowstride, 0);
dst_imagesize = get_texture_image_size(dst_format,
aligned_rowstride,
height, 1, 0);
dst_buffer = radeon_bo_open(radeon->radeonScreen->bom, 0, dst_imagesize, 1024, RADEON_GEM_DOMAIN_GTT, 0);
/* Disable source Y flipping for FBOs */
flip_y = (ctx->ReadBuffer->Name == 0);
if (pack->Invert) {
y = rrb->base.Height - height - y;
flip_y = !flip_y;
}
if (radeon->vtbl.blit(ctx,
rrb->bo,
rrb->draw_offset,
rrb->base.Format,
rrb->pitch / rrb->cpp,
rrb->base.Width,
rrb->base.Height,
x,
y,
dst_buffer,
0, /* dst_offset */
dst_format,
aligned_rowstride / _mesa_get_format_bytes(dst_format),
width,
height,
0, /* dst_x */
0, /* dst_y */
width,
height,
flip_y))
{
radeon_bo_map(dst_buffer, 0);
dst_rowstride *= _mesa_get_format_bytes(dst_format);
copy_rows(pixels, dst_rowstride, dst_buffer->ptr,
aligned_rowstride, height, dst_rowstride);
radeon_bo_unmap(dst_buffer);
radeon_bo_unref(dst_buffer);
return GL_TRUE;
} else {
radeon_bo_unref(dst_buffer);
return GL_FALSE;
}
}
void
radeonReadPixels(GLcontext * ctx,
GLint x, GLint y, GLsizei width, GLsizei height,
GLenum format, GLenum type,
const struct gl_pixelstore_attrib *pack, GLvoid * pixels)
{
if (do_blit_readpixels(ctx, x, y, width, height, format, type, pack, pixels))
return;
/* Update Mesa state before calling down into _swrast_ReadPixels, as
* the spans code requires the computed buffer states to be up to date,
* but _swrast_ReadPixels only updates Mesa state after setting up
* the spans code.
*/
radeon_print(RADEON_FALLBACKS, RADEON_NORMAL,
"Falling back to sw for ReadPixels (format %s, type %s)\n",
_mesa_lookup_enum_by_nr(format), _mesa_lookup_enum_by_nr(type));
if (ctx->NewState)
_mesa_update_state(ctx);
_swrast_ReadPixels(ctx, x, y, width, height, format, type, pack, pixels);
}
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