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/**************************************************************************
*
* Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
* 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, 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 TUNGSTEN GRAPHICS 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.
*
**************************************************************************/
/* Authors:
* Brian Paul
*/
#include "util/u_clear.h"
#include "util/u_format.h"
#include "util/u_pack_color.h"
#include "i915_context.h"
#include "i915_screen.h"
#include "i915_reg.h"
#include "i915_batch.h"
#include "i915_resource.h"
#include "i915_state.h"
void
i915_clear_emit(struct pipe_context *pipe, unsigned buffers,
const union pipe_color_union *color,
double depth, unsigned stencil,
unsigned destx, unsigned desty, unsigned width, unsigned height)
{
struct i915_context *i915 = i915_context(pipe);
uint32_t clear_params, clear_color, clear_depth, clear_stencil,
clear_color8888, packed_z_stencil;
union util_color u_color;
float f_depth = depth;
struct i915_texture *cbuf_tex, *depth_tex;
cbuf_tex = depth_tex = NULL;
clear_params = 0;
if (buffers & PIPE_CLEAR_COLOR) {
struct pipe_surface *cbuf = i915->framebuffer.cbufs[0];
clear_params |= CLEARPARAM_WRITE_COLOR;
cbuf_tex = i915_texture(cbuf->texture);
util_pack_color(color->f, cbuf->format, &u_color);
if (util_format_get_blocksize(cbuf_tex->b.b.format) == 4)
clear_color = u_color.ui;
else
clear_color = (u_color.ui & 0xffff) | (u_color.ui << 16);
/* correctly swizzle clear value */
if (i915->current.need_target_fixup)
util_pack_color(color->f, cbuf->format, &u_color);
else
util_pack_color(color->f, PIPE_FORMAT_B8G8R8A8_UNORM, &u_color);
clear_color8888 = u_color.ui;
} else
clear_color = clear_color8888 = 0;
clear_depth = clear_stencil = 0;
if (buffers & PIPE_CLEAR_DEPTH) {
struct pipe_surface *zbuf = i915->framebuffer.zsbuf;
clear_params |= CLEARPARAM_WRITE_DEPTH;
depth_tex = i915_texture(zbuf->texture);
packed_z_stencil = util_pack_z_stencil(depth_tex->b.b.format, depth, stencil);
if (util_format_get_blocksize(depth_tex->b.b.format) == 4) {
/* Avoid read-modify-write if there's no stencil. */
if (buffers & PIPE_CLEAR_STENCIL
|| depth_tex->b.b.format != PIPE_FORMAT_Z24_UNORM_S8_USCALED) {
clear_params |= CLEARPARAM_WRITE_STENCIL;
clear_stencil = packed_z_stencil & 0xff;
clear_depth = packed_z_stencil;
} else
clear_depth = packed_z_stencil & 0xffffff00;
} else {
clear_depth = (clear_depth & 0xffff) | (clear_depth << 16);
}
}
if (i915->hardware_dirty)
i915_emit_hardware_state(i915);
if (!BEGIN_BATCH(1 + 7 + 7)) {
FLUSH_BATCH(NULL);
i915_emit_hardware_state(i915);
i915->vbo_flushed = 1;
assert(BEGIN_BATCH(1 + 7 + 7));
}
OUT_BATCH(_3DSTATE_SCISSOR_ENABLE_CMD | DISABLE_SCISSOR_RECT);
OUT_BATCH(_3DSTATE_CLEAR_PARAMETERS);
OUT_BATCH(clear_params | CLEARPARAM_CLEAR_RECT);
/* Used for zone init prim */
OUT_BATCH(clear_color);
OUT_BATCH(clear_depth);
/* Used for clear rect prim */
OUT_BATCH(clear_color8888);
OUT_BATCH_F(f_depth);
OUT_BATCH(clear_stencil);
OUT_BATCH(_3DPRIMITIVE | PRIM3D_CLEAR_RECT | 5);
OUT_BATCH_F(destx + width);
OUT_BATCH_F(desty + height);
OUT_BATCH_F(destx);
OUT_BATCH_F(desty + height);
OUT_BATCH_F(destx);
OUT_BATCH_F(desty);
/* Flush after clear, its expected to be a costly operation.
* This is not required, just a heuristic, but without the flush we'd need to
* clobber the SCISSOR_ENABLE dynamic state. */
FLUSH_BATCH(NULL);
i915->last_fired_vertices = i915->fired_vertices;
i915->fired_vertices = 0;
}
/**
* Clear the given buffers to the specified values.
* No masking, no scissor (clear entire buffer).
*/
void
i915_clear_blitter(struct pipe_context *pipe, unsigned buffers,
const union pipe_color_union *color,
double depth, unsigned stencil)
{
util_clear(pipe, &i915_context(pipe)->framebuffer, buffers, color, depth,
stencil);
}
void
i915_clear_render(struct pipe_context *pipe, unsigned buffers,
const union pipe_color_union *color,
double depth, unsigned stencil)
{
struct i915_context *i915 = i915_context(pipe);
if (i915->dirty)
i915_update_derived(i915);
i915_clear_emit(pipe, buffers, color, depth, stencil,
0, 0, i915->framebuffer.width, i915->framebuffer.height);
}
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