src/mesa/drivers/dri/i915/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_tris.h"
  44 #include "intel_pixel.h"
  45
  46 #define FILE_DEBUG_FLAG DEBUG_PIXEL
  47
  48 static struct intel_region *
  49 copypix_src_region(struct intel_context *intel, GLenum type)
  50 {
  51    switch (type) {
  52    case GL_COLOR:
  53       return intel_readbuf_region(intel);
  54    case GL_DEPTH:
  55       /* Don't think this is really possible execpt at 16bpp, when we have no stencil.
  56        */
  57       if (intel->intelScreen->depth_region &&
  58           intel->intelScreen->depth_region->cpp == 2)
  59          return intel->intelScreen->depth_region;
  60    case GL_STENCIL:
  61       /* Don't think this is really possible.
  62        */
  63       break;
  64    case GL_DEPTH_STENCIL_EXT:
  65       /* Does it matter whether it is stencil/depth or depth/stencil?
  66        */
  67       return intel->intelScreen->depth_region;
  68    default:
  69       break;
  70    }
  71
  72    return NULL;
  73 }
  74
  75
  76 /**
  77  * Check if any fragment operations are in effect which might effect
  78  * glCopyPixels.  Differs from intel_check_blit_fragment_ops in that
  79  * we allow Scissor.
  80  */
  81 static GLboolean
  82 intel_check_copypixel_blit_fragment_ops(GLcontext * ctx)
  83 {
  84    if (ctx->NewState)
  85       _mesa_update_state(ctx);
  86
  87    /* Could do logicop with the blitter:
  88     */
  89    return !(ctx->_ImageTransferState ||
  90             ctx->Color.AlphaEnabled ||
  91             ctx->Depth.Test ||
  92             ctx->Fog.Enabled ||
  93             ctx->Stencil.Enabled ||
  94             !ctx->Color.ColorMask[0] ||
  95             !ctx->Color.ColorMask[1] ||
  96             !ctx->Color.ColorMask[2] ||
  97             !ctx->Color.ColorMask[3] ||
  98             ctx->Texture._EnabledUnits ||
  99             ctx->FragmentProgram._Enabled ||
 100             ctx->Color.BlendEnabled);
 101 }
 102
 103 /* Doesn't work for overlapping regions.  Could do a double copy or
 104  * just fallback.
 105  */
 106 static GLboolean
 107 do_texture_copypixels(GLcontext * ctx,
 108                       GLint srcx, GLint srcy,
 109                       GLsizei width, GLsizei height,
 110                       GLint dstx, GLint dsty, GLenum type)
 111 {
 112    struct intel_context *intel = intel_context(ctx);
 113    struct intel_region *dst = intel_drawbuf_region(intel);
 114    struct intel_region *src = copypix_src_region(intel, type);
 115    GLenum src_format;
 116    GLenum src_type;
 117
 118    DBG("%s %d,%d %dx%d --> %d,%d\n", __FUNCTION__,
 119        srcx, srcy, width, height, dstx, dsty);
 120
 121    if (!src || !dst || type != GL_COLOR)
 122       return GL_FALSE;
 123
 124    /* Can't handle overlapping regions.  Don't have sufficient control
 125     * over rasterization to pull it off in-place.  Punt on these for
 126     * now.
 127     *
 128     * XXX: do a copy to a temporary.
 129     */
 130    if (src->buffer == dst->buffer) {
 131       drm_clip_rect_t srcbox;
 132       drm_clip_rect_t dstbox;
 133       drm_clip_rect_t tmp;
 134
 135       srcbox.x1 = srcx;
 136       srcbox.y1 = srcy;
 137       srcbox.x2 = srcx + width;
 138       srcbox.y2 = srcy + height;
 139
 140       dstbox.x1 = dstx;
 141       dstbox.y1 = dsty;
 142       dstbox.x2 = dstx + width * ctx->Pixel.ZoomX;
 143       dstbox.y2 = dsty + height * ctx->Pixel.ZoomY;
 144
 145       DBG("src %d,%d %d,%d\n", srcbox.x1, srcbox.y1, srcbox.x2, srcbox.y2);
 146       DBG("dst %d,%d %d,%d (%dx%d) (%f,%f)\n", dstbox.x1, dstbox.y1, dstbox.x2, dstbox.y2,
 147           width, height, ctx->Pixel.ZoomX, ctx->Pixel.ZoomY);
 148
 149       if (intel_intersect_cliprects(&tmp, &srcbox, &dstbox)) {
 150          DBG("%s: regions overlap\n", __FUNCTION__);
 151          return GL_FALSE;
 152       }
 153    }
 154
 155    intelFlush(&intel->ctx);
 156
 157    intel->vtbl.install_meta_state(intel);
 158
 159    /* Is this true?  Also will need to turn depth testing on according
 160     * to state:
 161     */
 162    intel->vtbl.meta_no_stencil_write(intel);
 163    intel->vtbl.meta_no_depth_write(intel);
 164
 165    /* Set the 3d engine to draw into the destination region:
 166     */
 167    intel->vtbl.meta_draw_region(intel, dst, intel->intelScreen->depth_region);
 168
 169    intel->vtbl.meta_import_pixel_state(intel);
 170
 171    if (src->cpp == 2) {
 172       src_format = GL_RGB;
 173       src_type = GL_UNSIGNED_SHORT_5_6_5;
 174    }
 175    else {
 176       src_format = GL_BGRA;
 177       src_type = GL_UNSIGNED_BYTE;
 178    }
 179
 180    /* Set the frontbuffer up as a large rectangular texture.
 181     */
 182    if (!intel->vtbl.meta_tex_rect_source(intel, src->buffer, 0,
 183                                          src->pitch,
 184                                          src->height, src_format, src_type)) {
 185       intel->vtbl.leave_meta_state(intel);
 186       return GL_FALSE;
 187    }
 188
 189
 190    intel->vtbl.meta_texture_blend_replace(intel);
 191
 192    LOCK_HARDWARE(intel);
 193
 194    if (intel->driDrawable->numClipRects) {
 195       __DRIdrawablePrivate *dPriv = intel->driDrawable;
 196
 197
 198       srcy = dPriv->h - srcy - height;  /* convert from gl to hardware coords */
 199
 200       srcx += dPriv->x;
 201       srcy += dPriv->y;
 202
 203       /* Clip against the source region.  This is the only source
 204        * clipping we do.  XXX: Just set the texcord wrap mode to clamp
 205        * or similar.
 206        *
 207        */
 208       if (0) {
 209          GLint orig_x = srcx;
 210          GLint orig_y = srcy;
 211
 212          if (!_mesa_clip_to_region(0, 0, src->pitch, src->height,
 213                                    &srcx, &srcy, &width, &height))
 214             goto out;
 215
 216          dstx += srcx - orig_x;
 217          dsty += (srcy - orig_y) * ctx->Pixel.ZoomY;
 218       }
 219
 220       /* Just use the regular cliprect mechanism...  Does this need to
 221        * even hold the lock???
 222        */
 223       intel_meta_draw_quad(intel,
 224                            dstx,
 225                            dstx + width * ctx->Pixel.ZoomX,
 226                            dPriv->h - (dsty + height * ctx->Pixel.ZoomY),
 227                            dPriv->h - (dsty), 0,   /* XXX: what z value? */
 228                            0x00ff00ff,
 229                            srcx, srcx + width, srcy, srcy + height);
 230
 231     out:
 232       intel->vtbl.leave_meta_state(intel);
 233       intel_batchbuffer_flush(intel->batch);
 234    }
 235    UNLOCK_HARDWARE(intel);
 236
 237    DBG("%s: success\n", __FUNCTION__);
 238    return GL_TRUE;
 239 }
 240
 241
 242
 243
 244
 245 /**
 246  * CopyPixels with the blitter.  Don't support zooming, pixel transfer, etc.
 247  */
 248 static GLboolean
 249 do_blit_copypixels(GLcontext * ctx,
 250                    GLint srcx, GLint srcy,
 251                    GLsizei width, GLsizei height,
 252                    GLint dstx, GLint dsty, GLenum type)
 253 {
 254    struct intel_context *intel = intel_context(ctx);
 255    struct intel_region *dst = intel_drawbuf_region(intel);
 256    struct intel_region *src = copypix_src_region(intel, type);
 257
 258    /* Copypixels can be more than a straight copy.  Ensure all the
 259     * extra operations are disabled:
 260     */
 261    if (!intel_check_copypixel_blit_fragment_ops(ctx) ||
 262        ctx->Pixel.ZoomX != 1.0F || ctx->Pixel.ZoomY != 1.0F)
 263       return GL_FALSE;
 264
 265    if (!src || !dst)
 266       return GL_FALSE;
 267
 268
 269
 270    intelFlush(&intel->ctx);
 271
 272    LOCK_HARDWARE(intel);
 273
 274    if (intel->driDrawable->numClipRects) {
 275       __DRIdrawablePrivate *dPriv = intel->driDrawable;
 276       drm_clip_rect_t *box = dPriv->pClipRects;
 277       drm_clip_rect_t dest_rect;
 278       GLint nbox = dPriv->numClipRects;
 279       GLint delta_x = 0;
 280       GLint delta_y = 0;
 281       GLuint i;
 282
 283       /* Do scissoring in GL coordinates:
 284        */
 285       if (ctx->Scissor.Enabled)
 286       {
 287          GLint x = ctx->Scissor.X;
 288          GLint y = ctx->Scissor.Y;
 289          GLuint w = ctx->Scissor.Width;
 290          GLuint h = ctx->Scissor.Height;
 291          GLint dx = dstx - srcx;
 292          GLint dy = dsty - srcy;
 293
 294          if (!_mesa_clip_to_region(x, y, x+w-1, y+h-1, &dstx, &dsty, &width, &height))
 295             goto out;
 296
 297          srcx = dstx - dx;
 298          srcy = dsty - dy;
 299       }
 300
 301       /* Convert from GL to hardware coordinates:
 302        */
 303       dsty = dPriv->h - dsty - height;
 304       srcy = dPriv->h - srcy - height;
 305       dstx += dPriv->x;
 306       dsty += dPriv->y;
 307       srcx += dPriv->x;
 308       srcy += dPriv->y;
 309
 310       /* Clip against the source region.  This is the only source
 311        * clipping we do.  Dst is clipped with cliprects below.
 312        */
 313       {
 314          delta_x = srcx - dstx;
 315          delta_y = srcy - dsty;
 316
 317          if (!_mesa_clip_to_region(0, 0, src->pitch, src->height,
 318                                    &srcx, &srcy, &width, &height))
 319             goto out;
 320
 321          dstx = srcx - delta_x;
 322          dsty = srcy - delta_y;
 323       }
 324
 325       dest_rect.x1 = dstx;
 326       dest_rect.y1 = dsty;
 327       dest_rect.x2 = dstx + width;
 328       dest_rect.y2 = dsty + height;
 329
 330       /* Could do slightly more clipping: Eg, take the intersection of
 331        * the existing set of cliprects and those cliprects translated
 332        * by delta_x, delta_y:
 333        *
 334        * This code will not overwrite other windows, but will
 335        * introduce garbage when copying from obscured window regions.
 336        */
 337       for (i = 0; i < nbox; i++) {
 338          drm_clip_rect_t rect;
 339
 340          if (!intel_intersect_cliprects(&rect, &dest_rect, &box[i]))
 341             continue;
 342
 343
 344          intelEmitCopyBlit(intel, dst->cpp,
 345                            src->pitch, src->buffer, 0,
 346                            dst->pitch, dst->buffer, 0,
 347                            rect.x1 + delta_x,
 348                            rect.y1 + delta_y,       /* srcx, srcy */
 349                            rect.x1, rect.y1,    /* dstx, dsty */
 350                            rect.x2 - rect.x1, rect.y2 - rect.y1,
 351                            ctx->Color.ColorLogicOpEnabled ?
 352                            ctx->Color.LogicOp : GL_COPY);
 353       }
 354
 355     out:
 356       intel_batchbuffer_flush(intel->batch);
 357    }
 358    UNLOCK_HARDWARE(intel);
 359
 360    DBG("%s: success\n", __FUNCTION__);
 361    return GL_TRUE;
 362 }
 363
 364
 365 void
 366 intelCopyPixels(GLcontext * ctx,
 367                 GLint srcx, GLint srcy,
 368                 GLsizei width, GLsizei height,
 369                 GLint destx, GLint desty, GLenum type)
 370 {
 371    if (INTEL_DEBUG & DEBUG_PIXEL)
 372       fprintf(stderr, "%s\n", __FUNCTION__);
 373
 374    if (do_blit_copypixels(ctx, srcx, srcy, width, height, destx, desty, type))
 375       return;
 376
 377    if (do_texture_copypixels(ctx, srcx, srcy, width, height, destx, desty, type))
 378       return;
 379
 380    DBG("fallback to _swrast_CopyPixels\n");
 381
 382    _swrast_CopyPixels(ctx, srcx, srcy, width, height, destx, desty, type);
 383 }