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/enums.h"
  30 #include "main/image.h"
  31 #include "main/state.h"
  32 #include "main/mtypes.h"
  33 #include "main/macros.h"
  34 #include "swrast/swrast.h"
  35
  36 #include "intel_screen.h"
  37 #include "intel_context.h"
  38 #include "intel_batchbuffer.h"
  39 #include "intel_buffers.h"
  40 #include "intel_blit.h"
  41 #include "intel_regions.h"
  42 #include "intel_pixel.h"
  43
  44 #define FILE_DEBUG_FLAG DEBUG_PIXEL
  45
  46 static struct intel_region *
  47 copypix_src_region(struct intel_context *intel, GLenum type)
  48 {
  49    switch (type) {
  50    case GL_COLOR:
  51       return intel_readbuf_region(intel);
  52    case GL_DEPTH:
  53       /* Don't think this is really possible execpt at 16bpp, when we have no stencil.
  54        */
  55       if (intel->depth_region && intel->depth_region->cpp == 2)
  56          return intel->depth_region;
  57    case GL_STENCIL:
  58       /* Don't think this is really possible.
  59        */
  60       break;
  61    case GL_DEPTH_STENCIL_EXT:
  62       /* Does it matter whether it is stencil/depth or depth/stencil?
  63        */
  64       return intel->depth_region;
  65    default:
  66       break;
  67    }
  68
  69    return NULL;
  70 }
  71
  72
  73 /**
  74  * Check if any fragment operations are in effect which might effect
  75  * glCopyPixels.  Differs from intel_check_blit_fragment_ops in that
  76  * we allow Scissor.
  77  */
  78 static GLboolean
  79 intel_check_copypixel_blit_fragment_ops(GLcontext * ctx)
  80 {
  81    if (ctx->NewState)
  82       _mesa_update_state(ctx);
  83
  84    /* Could do logicop with the blitter:
  85     */
  86    return !(ctx->_ImageTransferState ||
  87             ctx->Color.AlphaEnabled ||
  88             ctx->Depth.Test ||
  89             ctx->Fog.Enabled ||
  90             ctx->Stencil.Enabled ||
  91             !ctx->Color.ColorMask[0] ||
  92             !ctx->Color.ColorMask[1] ||
  93             !ctx->Color.ColorMask[2] ||
  94             !ctx->Color.ColorMask[3] ||
  95             ctx->Texture._EnabledUnits ||
  96             ctx->FragmentProgram._Enabled ||
  97             ctx->Color.BlendEnabled);
  98 }
  99
 100 #ifdef I915
 101 /* Doesn't work for overlapping regions.  Could do a double copy or
 102  * just fallback.
 103  */
 104 static GLboolean
 105 do_texture_copypixels(GLcontext * ctx,
 106                       GLint srcx, GLint srcy,
 107                       GLsizei width, GLsizei height,
 108                       GLint dstx, GLint dsty, GLenum type)
 109 {
 110    struct intel_context *intel = intel_context(ctx);
 111    struct intel_region *dst = intel_drawbuf_region(intel);
 112    struct intel_region *src = copypix_src_region(intel, type);
 113    GLenum src_format;
 114    GLenum src_type;
 115
 116    DBG("%s %d,%d %dx%d --> %d,%d\n", __FUNCTION__,
 117        srcx, srcy, width, height, dstx, dsty);
 118
 119    if (!src || !dst || type != GL_COLOR)
 120       return GL_FALSE;
 121
 122    /* Can't handle overlapping regions.  Don't have sufficient control
 123     * over rasterization to pull it off in-place.  Punt on these for
 124     * now.
 125     *
 126     * XXX: do a copy to a temporary.
 127     */
 128    if (src->buffer == dst->buffer) {
 129       drm_clip_rect_t srcbox;
 130       drm_clip_rect_t dstbox;
 131       drm_clip_rect_t tmp;
 132
 133       srcbox.x1 = srcx;
 134       srcbox.y1 = srcy;
 135       srcbox.x2 = srcx + width;
 136       srcbox.y2 = srcy + height;
 137
 138       if (ctx->Pixel.ZoomX > 0) {
 139          dstbox.x1 = dstx;
 140          dstbox.x2 = dstx + width * ctx->Pixel.ZoomX;
 141       } else {
 142          dstbox.x1 = dstx + width * ctx->Pixel.ZoomX;
 143          dstbox.x2 = dstx;
 144       }
 145       if (ctx->Pixel.ZoomY > 0) {
 146          dstbox.y1 = dsty;
 147          dstbox.y2 = dsty + height * ctx->Pixel.ZoomY;
 148       } else {
 149          dstbox.y1 = dsty + height * ctx->Pixel.ZoomY;
 150          dstbox.y2 = dsty;
 151       }
 152
 153       DBG("src %d,%d %d,%d\n", srcbox.x1, srcbox.y1, srcbox.x2, srcbox.y2);
 154       DBG("dst %d,%d %d,%d (%dx%d) (%f,%f)\n", dstbox.x1, dstbox.y1, dstbox.x2, dstbox.y2,
 155           width, height, ctx->Pixel.ZoomX, ctx->Pixel.ZoomY);
 156
 157       if (intel_intersect_cliprects(&tmp, &srcbox, &dstbox)) {
 158          DBG("%s: regions overlap\n", __FUNCTION__);
 159          return GL_FALSE;
 160       }
 161    }
 162
 163    intelFlush(&intel->ctx);
 164
 165    intel->vtbl.install_meta_state(intel);
 166
 167    /* Is this true?  Also will need to turn depth testing on according
 168     * to state:
 169     */
 170    intel->vtbl.meta_no_stencil_write(intel);
 171    intel->vtbl.meta_no_depth_write(intel);
 172
 173    /* Set the 3d engine to draw into the destination region:
 174     */
 175    intel->vtbl.meta_draw_region(intel, dst, intel->depth_region);
 176
 177    intel->vtbl.meta_import_pixel_state(intel);
 178
 179    if (src->cpp == 2) {
 180       src_format = GL_RGB;
 181       src_type = GL_UNSIGNED_SHORT_5_6_5;
 182    }
 183    else {
 184       src_format = GL_BGRA;
 185       src_type = GL_UNSIGNED_BYTE;
 186    }
 187
 188    /* Set the frontbuffer up as a large rectangular texture.
 189     */
 190    if (!intel->vtbl.meta_tex_rect_source(intel, src->buffer, 0,
 191                                          src->pitch,
 192                                          src->height, src_format, src_type)) {
 193       intel->vtbl.leave_meta_state(intel);
 194       return GL_FALSE;
 195    }
 196
 197
 198    intel->vtbl.meta_texture_blend_replace(intel);
 199
 200    LOCK_HARDWARE(intel);
 201
 202    if (intel->driDrawable->numClipRects) {
 203       __DRIdrawablePrivate *dPriv = intel->driDrawable;
 204
 205
 206       srcy = dPriv->h - srcy - height;  /* convert from gl to hardware coords */
 207
 208       srcx += dPriv->x;
 209       srcy += dPriv->y;
 210
 211       /* Clip against the source region.  This is the only source
 212        * clipping we do.  XXX: Just set the texcord wrap mode to clamp
 213        * or similar.
 214        *
 215        */
 216       if (0) {
 217          GLint orig_x = srcx;
 218          GLint orig_y = srcy;
 219
 220          if (!_mesa_clip_to_region(0, 0, src->pitch, src->height,
 221                                    &srcx, &srcy, &width, &height))
 222             goto out;
 223
 224          dstx += srcx - orig_x;
 225          dsty += (srcy - orig_y) * ctx->Pixel.ZoomY;
 226       }
 227
 228       /* Just use the regular cliprect mechanism...  Does this need to
 229        * even hold the lock???
 230        */
 231       intel->vtbl.meta_draw_quad(intel,
 232                                  dstx,
 233                                  dstx + width * ctx->Pixel.ZoomX,
 234                                  dPriv->h - (dsty + height * ctx->Pixel.ZoomY),
 235                                  dPriv->h - (dsty), 0, /* XXX: what z value? */
 236                                  0x00ff00ff,
 237                                  srcx, srcx + width, srcy, srcy + height);
 238
 239     out:
 240       intel->vtbl.leave_meta_state(intel);
 241       intel_batchbuffer_emit_mi_flush(intel->batch);
 242    }
 243    UNLOCK_HARDWARE(intel);
 244
 245    DBG("%s: success\n", __FUNCTION__);
 246    return GL_TRUE;
 247 }
 248 #endif /* I915 */
 249
 250
 251 /**
 252  * CopyPixels with the blitter.  Don't support zooming, pixel transfer, etc.
 253  */
 254 static GLboolean
 255 do_blit_copypixels(GLcontext * ctx,
 256                    GLint srcx, GLint srcy,
 257                    GLsizei width, GLsizei height,
 258                    GLint dstx, GLint dsty, GLenum type)
 259 {
 260    struct intel_context *intel = intel_context(ctx);
 261    struct intel_region *dst = intel_drawbuf_region(intel);
 262    struct intel_region *src = copypix_src_region(intel, type);
 263    struct gl_framebuffer *fb = ctx->DrawBuffer;
 264    struct gl_framebuffer *read_fb = ctx->ReadBuffer;
 265    unsigned int num_cliprects;
 266    drm_clip_rect_t *cliprects;
 267    int x_off, y_off;
 268
 269    /* Update draw buffer bounds */
 270    _mesa_update_state(ctx);
 271
 272    /* Copypixels can be more than a straight copy.  Ensure all the
 273     * extra operations are disabled:
 274     */
 275    if (!intel_check_copypixel_blit_fragment_ops(ctx) ||
 276        ctx->Pixel.ZoomX != 1.0F || ctx->Pixel.ZoomY != 1.0F)
 277       return GL_FALSE;
 278
 279    if (!src || !dst)
 280       return GL_FALSE;
 281
 282
 283
 284    intelFlush(&intel->ctx);
 285
 286    LOCK_HARDWARE(intel);
 287
 288    intel_get_cliprects(intel, &cliprects, &num_cliprects, &x_off, &y_off);
 289    if (num_cliprects != 0) {
 290       GLint delta_x;
 291       GLint delta_y;
 292       GLint orig_dstx;
 293       GLint orig_dsty;
 294       GLint orig_srcx;
 295       GLint orig_srcy;
 296       GLuint i;
 297
 298       /* XXX: We fail to handle different inversion between read and draw framebuffer. */
 299
 300       /* Clip to destination buffer. */
 301       orig_dstx = dstx;
 302       orig_dsty = dsty;
 303       if (!_mesa_clip_to_region(fb->_Xmin, fb->_Ymin,
 304                                 fb->_Xmax, fb->_Ymax,
 305                                 &dstx, &dsty, &width, &height))
 306          goto out;
 307       /* Adjust src coords for our post-clipped destination origin */
 308       srcx += dstx - orig_dstx;
 309       srcy += dsty - orig_dsty;
 310
 311       /* Clip to source buffer. */
 312       orig_srcx = srcx;
 313       orig_srcy = srcy;
 314       if (!_mesa_clip_to_region(0, 0,
 315                                 read_fb->Width, read_fb->Height,
 316                                 &srcx, &srcy, &width, &height))
 317          goto out;
 318       /* Adjust dst coords for our post-clipped source origin */
 319       dstx += srcx - orig_srcx;
 320       dsty += srcy - orig_srcy;
 321
 322       /* Convert from GL to hardware coordinates:
 323        */
 324       if (fb->Name == 0) {
 325          /* copypixels to a system framebuffer */
 326          dstx = x_off + dstx;
 327          dsty = y_off + (fb->Height - dsty - height);
 328       } else {
 329          /* copypixels to a user framebuffer object */
 330          dstx = x_off + dstx;
 331          dsty = y_off + dsty;
 332       }
 333
 334       /* Flip source Y if it's a system framebuffer. */
 335       if (read_fb->Name == 0) {
 336          srcx = intel->driReadDrawable->x + srcx;
 337          srcy = intel->driReadDrawable->y + (fb->Height - srcy - height);
 338       }
 339
 340       delta_x = srcx - dstx;
 341       delta_y = srcy - dsty;
 342       /* Could do slightly more clipping: Eg, take the intersection of
 343        * the destination cliprects and the read drawable cliprects
 344        *
 345        * This code will not overwrite other windows, but will
 346        * introduce garbage when copying from obscured window regions.
 347        */
 348       for (i = 0; i < num_cliprects; i++) {
 349          GLint clip_x = dstx;
 350          GLint clip_y = dsty;
 351          GLint clip_w = width;
 352          GLint clip_h = height;
 353
 354          if (!_mesa_clip_to_region(cliprects[i].x1, cliprects[i].y1,
 355                                    cliprects[i].x2, cliprects[i].y2,
 356                                    &clip_x, &clip_y, &clip_w, &clip_h))
 357             continue;
 358
 359          intelEmitCopyBlit(intel, dst->cpp,
 360                            src->pitch, src->buffer, 0, src->tiling,
 361                            dst->pitch, dst->buffer, 0, dst->tiling,
 362                            clip_x + delta_x, clip_y + delta_y, /* srcx, srcy */
 363                            clip_x, clip_y, /* dstx, dsty */
 364                            clip_w, clip_h,
 365                            ctx->Color.ColorLogicOpEnabled ?
 366                            ctx->Color.LogicOp : GL_COPY);
 367       }
 368    }
 369 out:
 370    UNLOCK_HARDWARE(intel);
 371
 372    DBG("%s: success\n", __FUNCTION__);
 373    return GL_TRUE;
 374 }
 375
 376
 377 void
 378 intelCopyPixels(GLcontext * ctx,
 379                 GLint srcx, GLint srcy,
 380                 GLsizei width, GLsizei height,
 381                 GLint destx, GLint desty, GLenum type)
 382 {
 383    if (INTEL_DEBUG & DEBUG_PIXEL)
 384       fprintf(stderr, "%s\n", __FUNCTION__);
 385
 386    if (do_blit_copypixels(ctx, srcx, srcy, width, height, destx, desty, type))
 387       return;
 388
 389 #ifdef I915
 390    if (do_texture_copypixels(ctx, srcx, srcy, width, height, destx, desty, type))
 391       return;
 392 #endif
 393
 394    DBG("fallback to _swrast_CopyPixels\n");
 395
 396    _swrast_CopyPixels(ctx, srcx, srcy, width, height, destx, desty, type);
 397 }