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/**************************************************************************
*
* Copyright 2003 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.
*
**************************************************************************/
#include "intel_clear.h"
#include "intel_context.h"
#include "intel_blit.h"
#include "intel_buffers.h"
#include "intel_chipset.h"
#include "intel_fbo.h"
#include "intel_regions.h"
#include "intel_batchbuffer.h"
#include "main/framebuffer.h"
#include "swrast/swrast.h"
#include "drirenderbuffer.h"
#define FILE_DEBUG_FLAG DEBUG_BLIT
/* A true meta version of this would be very simple and additionally
* machine independent. Maybe we'll get there one day.
*/
static void
intelClearWithTris(struct intel_context *intel, GLbitfield mask)
{
GLcontext *ctx = &intel->ctx;
struct gl_framebuffer *fb = ctx->DrawBuffer;
GLuint buf;
intel->vtbl.install_meta_state(intel);
/* Back and stencil cliprects are the same. Try and do both
* buffers at once:
*/
if (mask & (BUFFER_BIT_BACK_LEFT | BUFFER_BIT_STENCIL | BUFFER_BIT_DEPTH)) {
struct intel_region *backRegion =
intel_get_rb_region(fb, BUFFER_BACK_LEFT);
struct intel_region *depthRegion =
intel_get_rb_region(fb, BUFFER_DEPTH);
intel->vtbl.meta_draw_region(intel, backRegion, depthRegion);
if (mask & BUFFER_BIT_BACK_LEFT)
intel->vtbl.meta_color_mask(intel, GL_TRUE);
else
intel->vtbl.meta_color_mask(intel, GL_FALSE);
if (mask & BUFFER_BIT_STENCIL)
intel->vtbl.meta_stencil_replace(intel,
intel->ctx.Stencil.WriteMask[0],
intel->ctx.Stencil.Clear);
else
intel->vtbl.meta_no_stencil_write(intel);
if (mask & BUFFER_BIT_DEPTH)
intel->vtbl.meta_depth_replace(intel);
else
intel->vtbl.meta_no_depth_write(intel);
intel->vtbl.meta_draw_quad(intel,
fb->_Xmin,
fb->_Xmax,
fb->_Ymin,
fb->_Ymax,
intel->ctx.Depth.Clear,
intel->ClearColor8888,
0, 0, 0, 0); /* texcoords */
mask &= ~(BUFFER_BIT_BACK_LEFT | BUFFER_BIT_STENCIL | BUFFER_BIT_DEPTH);
}
/* clear the remaining (color) renderbuffers */
for (buf = 0; buf < BUFFER_COUNT && mask; buf++) {
const GLuint bufBit = 1 << buf;
if (mask & bufBit) {
struct intel_renderbuffer *irbColor =
intel_renderbuffer(fb->Attachment[buf].Renderbuffer);
ASSERT(irbColor);
intel->vtbl.meta_no_depth_write(intel);
intel->vtbl.meta_no_stencil_write(intel);
intel->vtbl.meta_color_mask(intel, GL_TRUE);
intel->vtbl.meta_draw_region(intel, irbColor->region, NULL);
intel->vtbl.meta_draw_quad(intel,
fb->_Xmin,
fb->_Xmax,
fb->_Ymin,
fb->_Ymax,
0, intel->ClearColor8888,
0, 0, 0, 0); /* texcoords */
mask &= ~bufBit;
}
}
intel->vtbl.leave_meta_state(intel);
}
static const char *buffer_names[] = {
[BUFFER_FRONT_LEFT] = "front",
[BUFFER_BACK_LEFT] = "back",
[BUFFER_FRONT_RIGHT] = "front right",
[BUFFER_BACK_RIGHT] = "back right",
[BUFFER_AUX0] = "aux0",
[BUFFER_AUX1] = "aux1",
[BUFFER_AUX2] = "aux2",
[BUFFER_AUX3] = "aux3",
[BUFFER_DEPTH] = "depth",
[BUFFER_STENCIL] = "stencil",
[BUFFER_ACCUM] = "accum",
[BUFFER_COLOR0] = "color0",
[BUFFER_COLOR1] = "color1",
[BUFFER_COLOR2] = "color2",
[BUFFER_COLOR3] = "color3",
[BUFFER_COLOR4] = "color4",
[BUFFER_COLOR5] = "color5",
[BUFFER_COLOR6] = "color6",
[BUFFER_COLOR7] = "color7",
};
/**
* Called by ctx->Driver.Clear.
*/
static void
intelClear(GLcontext *ctx, GLbitfield mask)
{
struct intel_context *intel = intel_context(ctx);
const GLuint colorMask = *((GLuint *) & ctx->Color.ColorMask);
GLbitfield tri_mask = 0;
GLbitfield blit_mask = 0;
GLbitfield swrast_mask = 0;
struct gl_framebuffer *fb = ctx->DrawBuffer;
GLuint i;
if (0)
fprintf(stderr, "%s\n", __FUNCTION__);
/* HW color buffers (front, back, aux, generic FBO, etc) */
if (colorMask == ~0) {
/* clear all R,G,B,A */
/* XXX FBO: need to check if colorbuffers are software RBOs! */
blit_mask |= (mask & BUFFER_BITS_COLOR);
}
else {
/* glColorMask in effect */
tri_mask |= (mask & BUFFER_BITS_COLOR);
}
/* HW stencil */
if (mask & BUFFER_BIT_STENCIL) {
const struct intel_region *stencilRegion
= intel_get_rb_region(fb, BUFFER_STENCIL);
if (stencilRegion) {
/* have hw stencil */
if (IS_965(intel->intelScreen->deviceID) ||
(ctx->Stencil.WriteMask[0] & 0xff) != 0xff) {
/* We have to use the 3D engine if we're clearing a partial mask
* of the stencil buffer, or if we're on a 965 which has a tiled
* depth/stencil buffer in a layout we can't blit to.
*/
tri_mask |= BUFFER_BIT_STENCIL;
}
else {
/* clearing all stencil bits, use blitting */
blit_mask |= BUFFER_BIT_STENCIL;
}
}
}
/* HW depth */
if (mask & BUFFER_BIT_DEPTH) {
/* clear depth with whatever method is used for stencil (see above) */
if (IS_965(intel->intelScreen->deviceID) ||
tri_mask & BUFFER_BIT_STENCIL)
tri_mask |= BUFFER_BIT_DEPTH;
else
blit_mask |= BUFFER_BIT_DEPTH;
}
/* If we're doing a tri pass for depth/stencil, include a likely color
* buffer with it.
*/
if (mask & (BUFFER_BIT_DEPTH | BUFFER_BIT_STENCIL)) {
tri_mask |= blit_mask & BUFFER_BIT_BACK_LEFT;
blit_mask &= ~BUFFER_BIT_BACK_LEFT;
}
/* SW fallback clearing */
swrast_mask = mask & ~tri_mask & ~blit_mask;
for (i = 0; i < BUFFER_COUNT; i++) {
GLuint bufBit = 1 << i;
if ((blit_mask | tri_mask) & bufBit) {
if (!fb->Attachment[i].Renderbuffer->ClassID) {
blit_mask &= ~bufBit;
tri_mask &= ~bufBit;
swrast_mask |= bufBit;
}
}
}
if (blit_mask) {
if (INTEL_DEBUG & DEBUG_BLIT) {
DBG("blit clear:");
for (i = 0; i < BUFFER_COUNT; i++) {
if (blit_mask & (1 << i))
DBG(" %s", buffer_names[i]);
}
DBG("\n");
}
intelClearWithBlit(ctx, blit_mask);
}
if (tri_mask) {
if (INTEL_DEBUG & DEBUG_BLIT) {
DBG("tri clear:");
for (i = 0; i < BUFFER_COUNT; i++) {
if (tri_mask & (1 << i))
DBG(" %s", buffer_names[i]);
}
DBG("\n");
}
intelClearWithTris(intel, tri_mask);
}
if (swrast_mask) {
if (INTEL_DEBUG & DEBUG_BLIT) {
DBG("swrast clear:");
for (i = 0; i < BUFFER_COUNT; i++) {
if (swrast_mask & (1 << i))
DBG(" %s", buffer_names[i]);
}
DBG("\n");
}
_swrast_Clear(ctx, swrast_mask);
}
}
void
intelInitClearFuncs(struct dd_function_table *functions)
{
functions->Clear = intelClear;
}
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