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/*
* Copyright 2009 Marek Olšák <maraeo@gmail.com>
*
* 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
* on the rights to use, copy, modify, merge, publish, distribute, sub
* license, 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 NON-INFRINGEMENT. IN NO EVENT SHALL
* THE AUTHOR(S) AND/OR THEIR 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 "r300_blit.h"
#include "r300_context.h"
#include "r300_texture.h"
#include "util/u_format.h"
static void r300_blitter_save_states(struct r300_context* r300)
{
util_blitter_save_blend(r300->blitter, r300->blend_state.state);
util_blitter_save_depth_stencil_alpha(r300->blitter, r300->dsa_state.state);
util_blitter_save_stencil_ref(r300->blitter, &(r300->stencil_ref));
util_blitter_save_rasterizer(r300->blitter, r300->rs_state.state);
util_blitter_save_fragment_shader(r300->blitter, r300->fs);
util_blitter_save_vertex_shader(r300->blitter, r300->vs_state.state);
}
/* Clear currently bound buffers. */
void r300_clear(struct pipe_context* pipe,
unsigned buffers,
const float* rgba,
double depth,
unsigned stencil)
{
/* XXX Implement fastfill.
*
* If fastfill is enabled, a few facts should be considered:
*
* 1) Zbuffer must be micro-tiled and whole microtiles must be
* written.
*
* 2) ZB_DEPTHCLEARVALUE is used to clear a zbuffer and Z Mask must be
* equal to 0.
*
* 3) RB3D_COLOR_CLEAR_VALUE is used to clear a colorbuffer and
* RB3D_COLOR_CHANNEL_MASK must be equal to 0.
*
* 4) ZB_CB_CLEAR can be used to make the ZB units help in clearing
* the colorbuffer. The color clear value is supplied through both
* RB3D_COLOR_CLEAR_VALUE and ZB_DEPTHCLEARVALUE, and the colorbuffer
* must be set in ZB_DEPTHOFFSET and ZB_DEPTHPITCH in addition to
* RB3D_COLOROFFSET and RB3D_COLORPITCH. It's obvious that the zbuffer
* will not be cleared and multiple render targets cannot be cleared
* this way either.
*
* 5) For 16-bit integer buffering, compression causes a hung with one or
* two samples and should not be used.
*
* 6) Fastfill must not be used if reading of compressed Z data is disabled
* and writing of compressed Z data is enabled (RD/WR_COMP_ENABLE),
* i.e. it cannot be used to compress the zbuffer.
* (what the hell does that mean and how does it fit in clearing
* the buffers?)
*
* - Marek
*/
struct r300_context* r300 = r300_context(pipe);
struct pipe_framebuffer_state* fb =
(struct pipe_framebuffer_state*)r300->fb_state.state;
r300_blitter_save_states(r300);
util_blitter_clear(r300->blitter,
fb->width,
fb->height,
fb->nr_cbufs,
buffers, rgba, depth, stencil);
}
/* Copy a block of pixels from one surface to another using HW. */
static void r300_hw_copy(struct pipe_context* pipe,
struct pipe_surface* dst,
unsigned dstx, unsigned dsty,
struct pipe_surface* src,
unsigned srcx, unsigned srcy,
unsigned width, unsigned height)
{
struct r300_context* r300 = r300_context(pipe);
struct r300_textures_state* state =
(struct r300_textures_state*)r300->textures_state.state;
/* Yeah we have to save all those states to ensure this blitter operation
* is really transparent. The states will be restored by the blitter once
* copying is done. */
r300_blitter_save_states(r300);
util_blitter_save_framebuffer(r300->blitter, r300->fb_state.state);
util_blitter_save_fragment_sampler_states(
r300->blitter, state->sampler_count, (void**)state->sampler_states);
util_blitter_save_fragment_sampler_textures(
r300->blitter, state->texture_count,
(struct pipe_texture**)state->textures);
/* Do a copy */
util_blitter_copy(r300->blitter,
dst, dstx, dsty, src, srcx, srcy, width, height, TRUE);
}
/* Copy a block of pixels from one surface to another. */
void r300_surface_copy(struct pipe_context* pipe,
struct pipe_surface* dst,
unsigned dstx, unsigned dsty,
struct pipe_surface* src,
unsigned srcx, unsigned srcy,
unsigned width, unsigned height)
{
enum pipe_format old_format = dst->texture->format;
enum pipe_format new_format = old_format;
assert(dst->texture->format == src->texture->format);
if (!pipe->screen->is_format_supported(pipe->screen,
old_format, src->texture->target,
PIPE_TEXTURE_USAGE_RENDER_TARGET |
PIPE_TEXTURE_USAGE_SAMPLER, 0)) {
switch (util_format_get_blocksize(old_format)) {
case 1:
new_format = PIPE_FORMAT_I8_UNORM;
break;
case 2:
new_format = PIPE_FORMAT_A4R4G4B4_UNORM;
break;
case 4:
new_format = PIPE_FORMAT_A8R8G8B8_UNORM;
break;
default:
debug_printf("r300: surface_copy: Unhandled format: %s. Falling back to software.\n"
"r300: surface_copy: Software fallback doesn't work for tiled textures.\n",
util_format_name(old_format));
}
}
if (old_format != new_format) {
dst->format = new_format;
src->format = new_format;
r300_texture_reinterpret_format(pipe->screen,
dst->texture, new_format);
r300_texture_reinterpret_format(pipe->screen,
src->texture, new_format);
}
r300_hw_copy(pipe, dst, dstx, dsty, src, srcx, srcy, width, height);
if (old_format != new_format) {
dst->format = old_format;
src->format = old_format;
r300_texture_reinterpret_format(pipe->screen,
dst->texture, old_format);
r300_texture_reinterpret_format(pipe->screen,
src->texture, old_format);
}
}
/* Fill a region of a surface with a constant value. */
void r300_surface_fill(struct pipe_context* pipe,
struct pipe_surface* dst,
unsigned dstx, unsigned dsty,
unsigned width, unsigned height,
unsigned value)
{
struct r300_context* r300 = r300_context(pipe);
r300_blitter_save_states(r300);
util_blitter_save_framebuffer(r300->blitter, r300->fb_state.state);
util_blitter_fill(r300->blitter,
dst, dstx, dsty, width, height, value);
}
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