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