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

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