/**
* Compute sizes and fill in offset and blit information for the given
* image (determined by \p face and \p level).
*
* \param curOffset points to the offset at which the image is to be stored
* and is updated by this function according to the size of the image.
*/
static void compute_tex_image_offset(radeonContextPtr rmesa, radeon_mipmap_tree *mt,
GLuint face, GLuint level, GLuint* curOffset)
{
radeon_mipmap_level *lvl = &mt->levels[level];
GLuint height;
height = _mesa_next_pow_two_32(lvl->height);
lvl->rowstride = get_texture_image_row_stride(rmesa, mt->mesaFormat, lvl->width, mt->tilebits, mt->target);
lvl->size = get_texture_image_size(mt->mesaFormat, lvl->rowstride, height, lvl->depth, mt->tilebits);
assert(lvl->size > 0);
lvl->faces[face].offset = *curOffset;
*curOffset += lvl->size;
radeon_print(RADEON_TEXTURE, RADEON_TRACE,
"%s(%p) level %d, face %d: rs:%d %dx%d at %d\n",
__func__, rmesa,
level, face,
lvl->rowstride, lvl->width, height, lvl->faces[face].offset);
}
static GLboolean
do_blit_readpixels(struct gl_context * 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;
intptr_t dst_offset;
/* 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_rowstride *= _mesa_get_format_bytes(dst_format);
if (_mesa_is_bufferobj(pack->BufferObj) && aligned_rowstride != dst_rowstride)
return GL_FALSE;
dst_imagesize = get_texture_image_size(dst_format,
aligned_rowstride,
height, 1, 0);
if (!_mesa_is_bufferobj(pack->BufferObj))
{
dst_buffer = radeon_bo_open(radeon->radeonScreen->bom, 0, dst_imagesize, 1024, RADEON_GEM_DOMAIN_GTT, 0);
dst_offset = 0;
}
else
{
dst_buffer = get_radeon_buffer_object(pack->BufferObj)->bo;
dst_offset = (intptr_t)pixels;
}
/* 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,
dst_offset,
dst_format,
aligned_rowstride / _mesa_get_format_bytes(dst_format),
width,
height,
0, /* dst_x */
0, /* dst_y */
width,
height,
flip_y))
{
if (!_mesa_is_bufferobj(pack->BufferObj))
{
radeon_bo_map(dst_buffer, 0);
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;
}
if (!_mesa_is_bufferobj(pack->BufferObj))
radeon_bo_unref(dst_buffer);
return GL_FALSE;
}