--- /dev/null
+/**************************************************************************
+ *
+ * Copyright 2003 VMware, Inc.
+ * Copyright 2009 Intel Corporation.
+ * 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 VMWARE 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 "main/glheader.h"
+#include "main/mtypes.h"
+#include "main/condrender.h"
+#include "swrast/swrast.h"
+#include "drivers/common/meta.h"
+
+#include "intel_context.h"
+#include "intel_blit.h"
+#include "intel_clear.h"
+#include "intel_fbo.h"
+#include "intel_regions.h"
+
+#define FILE_DEBUG_FLAG DEBUG_BLIT
+
+static const char *buffer_names[] = {
+ [BUFFER_FRONT_LEFT] = "front",
+ [BUFFER_BACK_LEFT] = "back",
+ [BUFFER_FRONT_RIGHT] = "front right",
+ [BUFFER_BACK_RIGHT] = "back right",
+ [BUFFER_DEPTH] = "depth",
+ [BUFFER_STENCIL] = "stencil",
+ [BUFFER_ACCUM] = "accum",
+ [BUFFER_AUX0] = "aux0",
+ [BUFFER_COLOR0] = "color0",
+ [BUFFER_COLOR1] = "color1",
+ [BUFFER_COLOR2] = "color2",
+ [BUFFER_COLOR3] = "color3",
+ [BUFFER_COLOR4] = "color4",
+ [BUFFER_COLOR5] = "color5",
+ [BUFFER_COLOR6] = "color6",
+ [BUFFER_COLOR7] = "color7",
+};
+
+static void
+debug_mask(const char *name, GLbitfield mask)
+{
+ GLuint i;
+
+ if (unlikely(INTEL_DEBUG & DEBUG_BLIT)) {
+ DBG("%s clear:", name);
+ for (i = 0; i < BUFFER_COUNT; i++) {
+ if (mask & (1 << i))
+ DBG(" %s", buffer_names[i]);
+ }
+ DBG("\n");
+ }
+}
+
+/**
+ * Called by ctx->Driver.Clear.
+ */
+static void
+intelClear(struct gl_context *ctx, GLbitfield mask)
+{
+ struct intel_context *intel = intel_context(ctx);
+ const GLuint colorMask = *((GLuint *) & ctx->Color.ColorMask[0]);
+ GLbitfield tri_mask = 0;
+ GLbitfield blit_mask = 0;
+ GLbitfield swrast_mask = 0;
+ struct gl_framebuffer *fb = ctx->DrawBuffer;
+ struct intel_renderbuffer *irb;
+ int i;
+
+ if (mask & (BUFFER_BIT_FRONT_LEFT | BUFFER_BIT_FRONT_RIGHT)) {
+ intel->front_buffer_dirty = true;
+ }
+
+ if (0)
+ fprintf(stderr, "%s\n", __func__);
+
+ /* Get SW clears out of the way: Anything without an intel_renderbuffer */
+ for (i = 0; i < BUFFER_COUNT; i++) {
+ if (!(mask & (1 << i)))
+ continue;
+
+ irb = intel_get_renderbuffer(fb, i);
+ if (unlikely(!irb)) {
+ swrast_mask |= (1 << i);
+ mask &= ~(1 << i);
+ }
+ }
+ if (unlikely(swrast_mask)) {
+ debug_mask("swrast", swrast_mask);
+ _swrast_Clear(ctx, swrast_mask);
+ }
+
+ /* HW color buffers (front, back, aux, generic FBO, etc) */
+ if (colorMask == ~0) {
+ /* clear all R,G,B,A */
+ blit_mask |= (mask & BUFFER_BITS_COLOR);
+ }
+ else {
+ /* glColorMask in effect */
+ tri_mask |= (mask & BUFFER_BITS_COLOR);
+ }
+
+ /* Make sure we have up to date buffers before we start looking at
+ * the tiling bits to determine how to clear. */
+ intel_prepare_render(intel);
+
+ /* 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 (stencilRegion->tiling == I915_TILING_Y ||
+ (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) {
+ const struct intel_region *irb = intel_get_rb_region(fb, BUFFER_DEPTH);
+
+ /* clear depth with whatever method is used for stencil (see above) */
+ if (irb->tiling == I915_TILING_Y || 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)) {
+ int color_bit = ffs(mask & BUFFER_BITS_COLOR);
+ if (color_bit != 0) {
+ tri_mask |= blit_mask & (1 << (color_bit - 1));
+ blit_mask &= ~(1 << (color_bit - 1));
+ }
+ }
+
+ /* Anything left, just use tris */
+ tri_mask |= mask & ~blit_mask;
+
+ if (blit_mask) {
+ debug_mask("blit", blit_mask);
+ tri_mask |= intelClearWithBlit(ctx, blit_mask);
+ }
+
+ if (tri_mask) {
+ debug_mask("tri", tri_mask);
+ if (ctx->API == API_OPENGLES || !ctx->Extensions.ARB_fragment_shader)
+ _mesa_meta_Clear(&intel->ctx, tri_mask);
+ else
+ _mesa_meta_glsl_Clear(&intel->ctx, tri_mask);
+ }
+}
+
+
+void
+intelInitClearFuncs(struct dd_function_table *functions)
+{
+ functions->Clear = intelClear;
+}
projects / mesa.git / blobdiff