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