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

   1 /**************************************************************************
   2  *
   3  * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
   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 TUNGSTEN GRAPHICS 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 "intel_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
  44 #define FILE_DEBUG_FLAG DEBUG_PIXEL
  45
  46 /**
  47  * Check if any fragment operations are in effect which might effect
  48  * glCopyPixels.  Differs from intel_check_blit_fragment_ops in that
  49  * we allow Scissor.
  50  */
  51 static bool
  52 intel_check_copypixel_blit_fragment_ops(struct gl_context * ctx)
  53 {
  54    if (ctx->NewState)
  55       _mesa_update_state(ctx);
  56
  57    /* Could do logicop with the blitter:
  58     */
  59    return !(ctx->_ImageTransferState ||
  60             ctx->Color.AlphaEnabled ||
  61             ctx->Depth.Test ||
  62             ctx->Fog.Enabled ||
  63             ctx->Stencil._Enabled ||
  64             !ctx->Color.ColorMask[0][0] ||
  65             !ctx->Color.ColorMask[0][1] ||
  66             !ctx->Color.ColorMask[0][2] ||
  67             !ctx->Color.ColorMask[0][3] ||
  68             ctx->Texture._EnabledUnits ||
  69             ctx->FragmentProgram._Enabled ||
  70             ctx->Color.BlendEnabled);
  71 }
  72
  73
  74 /**
  75  * CopyPixels with the blitter.  Don't support zooming, pixel transfer, etc.
  76  */
  77 static bool
  78 do_blit_copypixels(struct gl_context * ctx,
  79                    GLint srcx, GLint srcy,
  80                    GLsizei width, GLsizei height,
  81                    GLint dstx, GLint dsty, GLenum type)
  82 {
  83    struct intel_context *intel = intel_context(ctx);
  84    struct gl_framebuffer *fb = ctx->DrawBuffer;
  85    struct gl_framebuffer *read_fb = ctx->ReadBuffer;
  86    GLint orig_dstx;
  87    GLint orig_dsty;
  88    GLint orig_srcx;
  89    GLint orig_srcy;
  90    bool flip = false;
  91    struct intel_renderbuffer *draw_irb = NULL;
  92    struct intel_renderbuffer *read_irb = NULL;
  93    gl_format read_format, draw_format;
  94
  95    /* Update draw buffer bounds */
  96    _mesa_update_state(ctx);
  97
  98    switch (type) {
  99    case GL_COLOR:
 100       if (fb->_NumColorDrawBuffers != 1) {
 101          perf_debug("glCopyPixels() fallback: MRT\n");
 102          return false;
 103       }
 104
 105       draw_irb = intel_renderbuffer(fb->_ColorDrawBuffers[0]);
 106       read_irb = intel_renderbuffer(read_fb->_ColorReadBuffer);
 107       break;
 108    case GL_DEPTH_STENCIL_EXT:
 109       draw_irb = intel_renderbuffer(fb->Attachment[BUFFER_DEPTH].Renderbuffer);
 110       read_irb =
 111          intel_renderbuffer(read_fb->Attachment[BUFFER_DEPTH].Renderbuffer);
 112       break;
 113    case GL_DEPTH:
 114       perf_debug("glCopyPixels() fallback: GL_DEPTH\n");
 115       return false;
 116    case GL_STENCIL:
 117       perf_debug("glCopyPixels() fallback: GL_STENCIL\n");
 118       return false;
 119    default:
 120       perf_debug("glCopyPixels(): Unknown type\n");
 121       return false;
 122    }
 123
 124    if (!draw_irb) {
 125       perf_debug("glCopyPixels() fallback: missing draw buffer\n");
 126       return false;
 127    }
 128
 129    if (!read_irb) {
 130       perf_debug("glCopyPixels() fallback: missing read buffer\n");
 131       return false;
 132    }
 133
 134    read_format = intel_rb_format(read_irb);
 135    draw_format = intel_rb_format(draw_irb);
 136
 137    if (draw_format != read_format &&
 138        !(draw_format == MESA_FORMAT_XRGB8888 &&
 139          read_format == MESA_FORMAT_ARGB8888)) {
 140       perf_debug("glCopyPixels() fallback: mismatched formats (%s -> %s\n",
 141                  _mesa_get_format_name(read_format),
 142                  _mesa_get_format_name(draw_format));
 143       return false;
 144    }
 145
 146    /* Copypixels can be more than a straight copy.  Ensure all the
 147     * extra operations are disabled:
 148     */
 149    if (!intel_check_copypixel_blit_fragment_ops(ctx) ||
 150        ctx->Pixel.ZoomX != 1.0F || ctx->Pixel.ZoomY != 1.0F)
 151       return false;
 152
 153    intel_prepare_render(intel);
 154
 155    intel_flush(&intel->ctx);
 156
 157    /* Clip to destination buffer. */
 158    orig_dstx = dstx;
 159    orig_dsty = dsty;
 160    if (!_mesa_clip_to_region(fb->_Xmin, fb->_Ymin,
 161                              fb->_Xmax, fb->_Ymax,
 162                              &dstx, &dsty, &width, &height))
 163       goto out;
 164    /* Adjust src coords for our post-clipped destination origin */
 165    srcx += dstx - orig_dstx;
 166    srcy += dsty - orig_dsty;
 167
 168    /* Clip to source buffer. */
 169    orig_srcx = srcx;
 170    orig_srcy = srcy;
 171    if (!_mesa_clip_to_region(0, 0,
 172                              read_fb->Width, read_fb->Height,
 173                              &srcx, &srcy, &width, &height))
 174       goto out;
 175    /* Adjust dst coords for our post-clipped source origin */
 176    dstx += srcx - orig_srcx;
 177    dsty += srcy - orig_srcy;
 178
 179    /* Flip dest Y if it's a window system framebuffer. */
 180    if (_mesa_is_winsys_fbo(fb)) {
 181       /* copypixels to a window system framebuffer */
 182       dsty = fb->Height - dsty - height;
 183       flip = !flip;
 184    }
 185
 186    /* Flip source Y if it's a window system framebuffer. */
 187    if (_mesa_is_winsys_fbo(read_fb)) {
 188       srcy = read_fb->Height - srcy - height;
 189       flip = !flip;
 190    }
 191
 192    srcx += read_irb->draw_x;
 193    srcy += read_irb->draw_y;
 194    dstx += draw_irb->draw_x;
 195    dsty += draw_irb->draw_y;
 196
 197    uint32_t src_pitch = read_irb->mt->region->pitch;
 198    if (flip)
 199       src_pitch = -src_pitch;
 200
 201    if (!intelEmitCopyBlit(intel,
 202                           draw_irb->mt->cpp,
 203                           src_pitch, read_irb->mt->region->bo,
 204                           0, read_irb->mt->region->tiling,
 205                           draw_irb->mt->region->pitch, draw_irb->mt->region->bo,
 206                           0, draw_irb->mt->region->tiling,
 207                           srcx, srcy,
 208                           dstx, dsty,
 209                           width, height,
 210                           ctx->Color.ColorLogicOpEnabled ?
 211                           ctx->Color.LogicOp : GL_COPY)) {
 212       DBG("%s: blit failure\n", __FUNCTION__);
 213       return false;
 214    }
 215
 216 out:
 217    intel_check_front_buffer_rendering(intel);
 218
 219    DBG("%s: success\n", __FUNCTION__);
 220    return true;
 221 }
 222
 223
 224 void
 225 intelCopyPixels(struct gl_context * ctx,
 226                 GLint srcx, GLint srcy,
 227                 GLsizei width, GLsizei height,
 228                 GLint destx, GLint desty, GLenum type)
 229 {
 230    DBG("%s\n", __FUNCTION__);
 231
 232    if (!_mesa_check_conditional_render(ctx))
 233       return;
 234
 235    if (do_blit_copypixels(ctx, srcx, srcy, width, height, destx, desty, type))
 236       return;
 237
 238    /* this will use swrast if needed */
 239    _mesa_meta_CopyPixels(ctx, srcx, srcy, width, height, destx, desty, type);
 240 }