| /************************************************************************** |
| * |
| * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas. |
| * 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 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 "main/glheader.h" |
| #include "main/mtypes.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", |
| }; |
| |
| /** |
| * 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 (mask & (BUFFER_BIT_FRONT_LEFT | BUFFER_BIT_FRONT_RIGHT)) { |
| intel->front_buffer_dirty = GL_TRUE; |
| } |
| |
| 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_BIT_FRONT_LEFT | BUFFER_BIT_BACK_LEFT)); |
| } |
| |
| /* 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 = _mesa_ffs(mask & BUFFER_BITS_COLOR); |
| if (color_bit != 0) { |
| tri_mask |= blit_mask & (1 << (color_bit - 1)); |
| blit_mask &= ~(1 << (color_bit - 1)); |
| } |
| } |
| |
| /* SW fallback clearing */ |
| swrast_mask = mask & ~tri_mask & ~blit_mask; |
| |
| { |
| /* look for non-Intel renderbuffers (clear them with swrast) */ |
| GLbitfield blit_or_tri = blit_mask | tri_mask; |
| while (blit_or_tri) { |
| GLuint i = _mesa_ffs(blit_or_tri) - 1; |
| GLbitfield bufBit = 1 << i; |
| if (!fb->Attachment[i].Renderbuffer->ClassID) { |
| blit_mask &= ~bufBit; |
| tri_mask &= ~bufBit; |
| swrast_mask |= bufBit; |
| } |
| blit_or_tri ^= 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"); |
| } |
| |
| _mesa_meta_Clear(&intel->ctx, 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; |
| } |