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_pixel.h"
  40 #include "intel_fbo.h"
  41 #include "intel_blit.h"
  42 #include "intel_batchbuffer.h"
  43
  44 #define FILE_DEBUG_FLAG DEBUG_PIXEL
  45
  46 /**
  47  * CopyPixels with the blitter.  Don't support zooming, pixel transfer, etc.
  48  */
  49 static bool
  50 do_blit_copypixels(struct gl_context * ctx,
  51                    GLint srcx, GLint srcy,
  52                    GLsizei width, GLsizei height,
  53                    GLint dstx, GLint dsty, GLenum type)
  54 {
  55    struct brw_context *brw = brw_context(ctx);
  56    struct gl_framebuffer *fb = ctx->DrawBuffer;
  57    struct gl_framebuffer *read_fb = ctx->ReadBuffer;
  58    GLint orig_dstx;
  59    GLint orig_dsty;
  60    GLint orig_srcx;
  61    GLint orig_srcy;
  62    struct intel_renderbuffer *draw_irb = NULL;
  63    struct intel_renderbuffer *read_irb = NULL;
  64
  65    /* Update draw buffer bounds */
  66    _mesa_update_state(ctx);
  67
  68    intel_prepare_render(brw);
  69
  70    switch (type) {
  71    case GL_COLOR:
  72       if (fb->_NumColorDrawBuffers != 1) {
  73          perf_debug("glCopyPixels() fallback: MRT\n");
  74          return false;
  75       }
  76
  77       draw_irb = intel_renderbuffer(fb->_ColorDrawBuffers[0]);
  78       read_irb = intel_renderbuffer(read_fb->_ColorReadBuffer);
  79       break;
  80    case GL_DEPTH_STENCIL_EXT:
  81       draw_irb = intel_renderbuffer(fb->Attachment[BUFFER_DEPTH].Renderbuffer);
  82       read_irb =
  83          intel_renderbuffer(read_fb->Attachment[BUFFER_DEPTH].Renderbuffer);
  84       break;
  85    case GL_DEPTH:
  86       perf_debug("glCopyPixels() fallback: GL_DEPTH\n");
  87       return false;
  88    case GL_STENCIL:
  89       perf_debug("glCopyPixels() fallback: GL_STENCIL\n");
  90       return false;
  91    default:
  92       perf_debug("glCopyPixels(): Unknown type\n");
  93       return false;
  94    }
  95
  96    if (!draw_irb) {
  97       perf_debug("glCopyPixels() fallback: missing draw buffer\n");
  98       return false;
  99    }
 100
 101    if (!read_irb) {
 102       perf_debug("glCopyPixels() fallback: missing read buffer\n");
 103       return false;
 104    }
 105
 106    if (draw_irb->mt->num_samples > 1 || read_irb->mt->num_samples > 1) {
 107       perf_debug("glCopyPixels() fallback: multisampled buffers\n");
 108       return false;
 109    }
 110
 111    if (ctx->_ImageTransferState) {
 112       perf_debug("glCopyPixels(): Unsupported image transfer state\n");
 113       return false;
 114    }
 115
 116    if (ctx->Depth.Test) {
 117       perf_debug("glCopyPixels(): Unsupported depth test state\n");
 118       return false;
 119    }
 120
 121    if (ctx->Stencil._Enabled) {
 122       perf_debug("glCopyPixels(): Unsupported stencil test state\n");
 123       return false;
 124    }
 125
 126    if (ctx->Fog.Enabled ||
 127        ctx->Texture._MaxEnabledTexImageUnit != -1 ||
 128        ctx->FragmentProgram._Enabled) {
 129       perf_debug("glCopyPixels(): Unsupported fragment shader state\n");
 130       return false;
 131    }
 132
 133    if (ctx->Color.AlphaEnabled ||
 134        ctx->Color.BlendEnabled) {
 135       perf_debug("glCopyPixels(): Unsupported blend state\n");
 136       return false;
 137    }
 138
 139    if (!ctx->Color.ColorMask[0][0] ||
 140        !ctx->Color.ColorMask[0][1] ||
 141        !ctx->Color.ColorMask[0][2] ||
 142        !ctx->Color.ColorMask[0][3]) {
 143       perf_debug("glCopyPixels(): Unsupported color mask state\n");
 144       return false;
 145    }
 146
 147    if (ctx->Pixel.ZoomX != 1.0F || ctx->Pixel.ZoomY != 1.0F) {
 148       perf_debug("glCopyPixles(): Unsupported pixel zoom\n");
 149       return false;
 150    }
 151
 152    intel_batchbuffer_flush(brw);
 153
 154    /* Clip to destination buffer. */
 155    orig_dstx = dstx;
 156    orig_dsty = dsty;
 157    if (!_mesa_clip_to_region(fb->_Xmin, fb->_Ymin,
 158                              fb->_Xmax, fb->_Ymax,
 159                              &dstx, &dsty, &width, &height))
 160       goto out;
 161    /* Adjust src coords for our post-clipped destination origin */
 162    srcx += dstx - orig_dstx;
 163    srcy += dsty - orig_dsty;
 164
 165    /* Clip to source buffer. */
 166    orig_srcx = srcx;
 167    orig_srcy = srcy;
 168    if (!_mesa_clip_to_region(0, 0,
 169                              read_fb->Width, read_fb->Height,
 170                              &srcx, &srcy, &width, &height))
 171       goto out;
 172    /* Adjust dst coords for our post-clipped source origin */
 173    dstx += srcx - orig_srcx;
 174    dsty += srcy - orig_srcy;
 175
 176    if (!intel_miptree_blit(brw,
 177                            read_irb->mt, read_irb->mt_level, read_irb->mt_layer,
 178                            srcx, srcy, _mesa_is_winsys_fbo(read_fb),
 179                            draw_irb->mt, draw_irb->mt_level, draw_irb->mt_layer,
 180                            dstx, dsty, _mesa_is_winsys_fbo(fb),
 181                            width, height,
 182                            (ctx->Color.ColorLogicOpEnabled ?
 183                             ctx->Color.LogicOp : GL_COPY))) {
 184       DBG("%s: blit failure\n", __func__);
 185       return false;
 186    }
 187
 188    if (ctx->Query.CurrentOcclusionObject)
 189       ctx->Query.CurrentOcclusionObject->Result += width * height;
 190
 191 out:
 192
 193    DBG("%s: success\n", __func__);
 194    return true;
 195 }
 196
 197
 198 void
 199 intelCopyPixels(struct gl_context * ctx,
 200                 GLint srcx, GLint srcy,
 201                 GLsizei width, GLsizei height,
 202                 GLint destx, GLint desty, GLenum type)
 203 {
 204    DBG("%s\n", __func__);
 205
 206    if (!_mesa_check_conditional_render(ctx))
 207       return;
 208
 209    if (do_blit_copypixels(ctx, srcx, srcy, width, height, destx, desty, type))
 210       return;
 211
 212    /* this will use swrast if needed */
 213    _mesa_meta_CopyPixels(ctx, srcx, srcy, width, height, destx, desty, type);
 214 }