src/mesa/drivers/dri/i965/intel_pixel_copy.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2003 VMware, Inc.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #include "main/glheader.h"
  29 #include "main/image.h"
  30 #include "main/state.h"
  31 #include "main/mtypes.h"
  32 #include "main/condrender.h"
  33 #include "main/fbobject.h"
  34 #include "drivers/common/meta.h"
  35
  36 #include "brw_context.h"
  37 #include "intel_buffers.h"
  38 #include "intel_mipmap_tree.h"
  39 #include "intel_regions.h"
  40 #include "intel_pixel.h"
  41 #include "intel_fbo.h"
  42 #include "intel_blit.h"
  43 #include "intel_batchbuffer.h"
  44
  45 #define FILE_DEBUG_FLAG DEBUG_PIXEL
  46
  47 /**
  48  * CopyPixels with the blitter.  Don't support zooming, pixel transfer, etc.
  49  */
  50 static bool
  51 do_blit_copypixels(struct gl_context * ctx,
  52                    GLint srcx, GLint srcy,
  53                    GLsizei width, GLsizei height,
  54                    GLint dstx, GLint dsty, GLenum type)
  55 {
  56    struct brw_context *brw = brw_context(ctx);
  57    struct gl_framebuffer *fb = ctx->DrawBuffer;
  58    struct gl_framebuffer *read_fb = ctx->ReadBuffer;
  59    GLint orig_dstx;
  60    GLint orig_dsty;
  61    GLint orig_srcx;
  62    GLint orig_srcy;
  63    struct intel_renderbuffer *draw_irb = NULL;
  64    struct intel_renderbuffer *read_irb = NULL;
  65
  66    /* Update draw buffer bounds */
  67    _mesa_update_state(ctx);
  68
  69    intel_prepare_render(brw);
  70
  71    switch (type) {
  72    case GL_COLOR:
  73       if (fb->_NumColorDrawBuffers != 1) {
  74          perf_debug("glCopyPixels() fallback: MRT\n");
  75          return false;
  76       }
  77
  78       draw_irb = intel_renderbuffer(fb->_ColorDrawBuffers[0]);
  79       read_irb = intel_renderbuffer(read_fb->_ColorReadBuffer);
  80       break;
  81    case GL_DEPTH_STENCIL_EXT:
  82       draw_irb = intel_renderbuffer(fb->Attachment[BUFFER_DEPTH].Renderbuffer);
  83       read_irb =
  84          intel_renderbuffer(read_fb->Attachment[BUFFER_DEPTH].Renderbuffer);
  85       break;
  86    case GL_DEPTH:
  87       perf_debug("glCopyPixels() fallback: GL_DEPTH\n");
  88       return false;
  89    case GL_STENCIL:
  90       perf_debug("glCopyPixels() fallback: GL_STENCIL\n");
  91       return false;
  92    default:
  93       perf_debug("glCopyPixels(): Unknown type\n");
  94       return false;
  95    }
  96
  97    if (!draw_irb) {
  98       perf_debug("glCopyPixels() fallback: missing draw buffer\n");
  99       return false;
 100    }
 101
 102    if (!read_irb) {
 103       perf_debug("glCopyPixels() fallback: missing read buffer\n");
 104       return false;
 105    }
 106
 107    if (draw_irb->mt->num_samples > 1 || read_irb->mt->num_samples > 1) {
 108       perf_debug("glCopyPixels() fallback: multisampled buffers\n");
 109       return false;
 110    }
 111
 112    if (ctx->_ImageTransferState) {
 113       perf_debug("glCopyPixels(): Unsupported image transfer state\n");
 114       return false;
 115    }
 116
 117    if (ctx->Depth.Test) {
 118       perf_debug("glCopyPixels(): Unsupported depth test state\n");
 119       return false;
 120    }
 121
 122    if (ctx->Stencil._Enabled) {
 123       perf_debug("glCopyPixels(): Unsupported stencil test state\n");
 124       return false;
 125    }
 126
 127    if (ctx->Fog.Enabled ||
 128        ctx->Texture._EnabledUnits ||
 129        ctx->FragmentProgram._Enabled) {
 130       perf_debug("glCopyPixels(): Unsupported fragment shader state\n");
 131       return false;
 132    }
 133
 134    if (ctx->Color.AlphaEnabled ||
 135        ctx->Color.BlendEnabled) {
 136       perf_debug("glCopyPixels(): Unsupported blend state\n");
 137       return false;
 138    }
 139
 140    if (!ctx->Color.ColorMask[0][0] ||
 141        !ctx->Color.ColorMask[0][1] ||
 142        !ctx->Color.ColorMask[0][2] ||
 143        !ctx->Color.ColorMask[0][3]) {
 144       perf_debug("glCopyPixels(): Unsupported color mask state\n");
 145       return false;
 146    }
 147
 148    if (ctx->Pixel.ZoomX != 1.0F || ctx->Pixel.ZoomY != 1.0F) {
 149       perf_debug("glCopyPixles(): Unsupported pixel zoom\n");
 150       return false;
 151    }
 152
 153    intel_batchbuffer_flush(brw);
 154
 155    /* Clip to destination buffer. */
 156    orig_dstx = dstx;
 157    orig_dsty = dsty;
 158    if (!_mesa_clip_to_region(fb->_Xmin, fb->_Ymin,
 159                              fb->_Xmax, fb->_Ymax,
 160                              &dstx, &dsty, &width, &height))
 161       goto out;
 162    /* Adjust src coords for our post-clipped destination origin */
 163    srcx += dstx - orig_dstx;
 164    srcy += dsty - orig_dsty;
 165
 166    /* Clip to source buffer. */
 167    orig_srcx = srcx;
 168    orig_srcy = srcy;
 169    if (!_mesa_clip_to_region(0, 0,
 170                              read_fb->Width, read_fb->Height,
 171                              &srcx, &srcy, &width, &height))
 172       goto out;
 173    /* Adjust dst coords for our post-clipped source origin */
 174    dstx += srcx - orig_srcx;
 175    dsty += srcy - orig_srcy;
 176
 177    if (!intel_miptree_blit(brw,
 178                            read_irb->mt, read_irb->mt_level, read_irb->mt_layer,
 179                            srcx, srcy, _mesa_is_winsys_fbo(read_fb),
 180                            draw_irb->mt, draw_irb->mt_level, draw_irb->mt_layer,
 181                            dstx, dsty, _mesa_is_winsys_fbo(fb),
 182                            width, height,
 183                            (ctx->Color.ColorLogicOpEnabled ?
 184                             ctx->Color.LogicOp : GL_COPY))) {
 185       DBG("%s: blit failure\n", __FUNCTION__);
 186       return false;
 187    }
 188
 189    if (ctx->Query.CurrentOcclusionObject)
 190       ctx->Query.CurrentOcclusionObject->Result += width * height;
 191
 192 out:
 193    intel_check_front_buffer_rendering(brw);
 194
 195    DBG("%s: success\n", __FUNCTION__);
 196    return true;
 197 }
 198
 199
 200 void
 201 intelCopyPixels(struct gl_context * ctx,
 202                 GLint srcx, GLint srcy,
 203                 GLsizei width, GLsizei height,
 204                 GLint destx, GLint desty, GLenum type)
 205 {
 206    DBG("%s\n", __FUNCTION__);
 207
 208    if (!_mesa_check_conditional_render(ctx))
 209       return;
 210
 211    if (do_blit_copypixels(ctx, srcx, srcy, width, height, destx, desty, type))
 212       return;
 213
 214    /* this will use swrast if needed */
 215    _mesa_meta_CopyPixels(ctx, srcx, srcy, width, height, destx, desty, type);
 216 }