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    if (ctx->_ImageTransferState) {
 123       if (INTEL_DEBUG & DEBUG_PIXEL)
 124          fprintf(stderr, "%s: check_color failed\n", __FUNCTION__);
 125       return GL_FALSE;
 126    }
 127
 128    /* Can't handle overlapping regions.  Don't have sufficient control
 129     * over rasterization to pull it off in-place.  Punt on these for
 130     * now.
 131     *
 132     * XXX: do a copy to a temporary.
 133     */
 134    if (src->buffer == dst->buffer) {
 135       drm_clip_rect_t srcbox;
 136       drm_clip_rect_t dstbox;
 137       drm_clip_rect_t tmp;
 138
 139       srcbox.x1 = srcx;
 140       srcbox.y1 = srcy;
 141       srcbox.x2 = srcx + width;
 142       srcbox.y2 = srcy + height;
 143
 144       if (ctx->Pixel.ZoomX > 0) {
 145          dstbox.x1 = dstx;
 146          dstbox.x2 = dstx + width * ctx->Pixel.ZoomX;
 147       } else {
 148          dstbox.x1 = dstx + width * ctx->Pixel.ZoomX;
 149          dstbox.x2 = dstx;
 150       }
 151       if (ctx->Pixel.ZoomY > 0) {
 152          dstbox.y1 = dsty;
 153          dstbox.y2 = dsty + height * ctx->Pixel.ZoomY;
 154       } else {
 155          dstbox.y1 = dsty + height * ctx->Pixel.ZoomY;
 156          dstbox.y2 = dsty;
 157       }
 158
 159       DBG("src %d,%d %d,%d\n", srcbox.x1, srcbox.y1, srcbox.x2, srcbox.y2);
 160       DBG("dst %d,%d %d,%d (%dx%d) (%f,%f)\n", dstbox.x1, dstbox.y1, dstbox.x2, dstbox.y2,
 161           width, height, ctx->Pixel.ZoomX, ctx->Pixel.ZoomY);
 162
 163       if (intel_intersect_cliprects(&tmp, &srcbox, &dstbox)) {
 164          DBG("%s: regions overlap\n", __FUNCTION__);
 165          return GL_FALSE;
 166       }
 167    }
 168
 169    intelFlush(&intel->ctx);
 170
 171    intel->vtbl.install_meta_state(intel);
 172
 173    /* Is this true?  Also will need to turn depth testing on according
 174     * to state:
 175     */
 176    intel->vtbl.meta_no_stencil_write(intel);
 177    intel->vtbl.meta_no_depth_write(intel);
 178
 179    /* Set the 3d engine to draw into the destination region:
 180     */
 181    intel->vtbl.meta_draw_region(intel, dst, intel->depth_region);
 182
 183    intel->vtbl.meta_import_pixel_state(intel);
 184
 185    if (src->cpp == 2) {
 186       src_format = GL_RGB;
 187       src_type = GL_UNSIGNED_SHORT_5_6_5;
 188    }
 189    else {
 190       src_format = GL_BGRA;
 191       src_type = GL_UNSIGNED_BYTE;
 192    }
 193
 194    /* Set the frontbuffer up as a large rectangular texture.
 195     */
 196    if (!intel->vtbl.meta_tex_rect_source(intel, src->buffer, 0,
 197                                          src->pitch,
 198                                          src->height, src_format, src_type)) {
 199       intel->vtbl.leave_meta_state(intel);
 200       return GL_FALSE;
 201    }
 202
 203
 204    intel->vtbl.meta_texture_blend_replace(intel);
 205
 206    LOCK_HARDWARE(intel);
 207
 208    if (intel->driDrawable->numClipRects) {
 209       __DRIdrawablePrivate *dPriv = intel->driDrawable;
 210
 211
 212       srcy = dPriv->h - srcy - height;  /* convert from gl to hardware coords */
 213
 214       srcx += dPriv->x;
 215       srcy += dPriv->y;
 216
 217       /* Clip against the source region.  This is the only source
 218        * clipping we do.  XXX: Just set the texcord wrap mode to clamp
 219        * or similar.
 220        *
 221        */
 222       if (0) {
 223          GLint orig_x = srcx;
 224          GLint orig_y = srcy;
 225
 226          if (!_mesa_clip_to_region(0, 0, src->pitch, src->height,
 227                                    &srcx, &srcy, &width, &height))
 228             goto out;
 229
 230          dstx += srcx - orig_x;
 231          dsty += (srcy - orig_y) * ctx->Pixel.ZoomY;
 232       }
 233
 234       /* Just use the regular cliprect mechanism...  Does this need to
 235        * even hold the lock???
 236        */
 237       intel->vtbl.meta_draw_quad(intel,
 238                                  dstx,
 239                                  dstx + width * ctx->Pixel.ZoomX,
 240                                  dPriv->h - (dsty + height * ctx->Pixel.ZoomY),
 241                                  dPriv->h - (dsty), 0, /* XXX: what z value? */
 242                                  0x00ff00ff,
 243                                  srcx, srcx + width, srcy, srcy + height);
 244
 245     out:
 246       intel->vtbl.leave_meta_state(intel);
 247       intel_batchbuffer_emit_mi_flush(intel->batch);
 248    }
 249    UNLOCK_HARDWARE(intel);
 250
 251    DBG("%s: success\n", __FUNCTION__);
 252    return GL_TRUE;
 253 }
 254 #endif /* I915 */
 255
 256
 257 /**
 258  * CopyPixels with the blitter.  Don't support zooming, pixel transfer, etc.
 259  */
 260 static GLboolean
 261 do_blit_copypixels(GLcontext * ctx,
 262                    GLint srcx, GLint srcy,
 263                    GLsizei width, GLsizei height,
 264                    GLint dstx, GLint dsty, GLenum type)
 265 {
 266    struct intel_context *intel = intel_context(ctx);
 267    struct intel_region *dst = intel_drawbuf_region(intel);
 268    struct intel_region *src = copypix_src_region(intel, type);
 269    struct gl_framebuffer *fb = ctx->DrawBuffer;
 270    struct gl_framebuffer *read_fb = ctx->ReadBuffer;
 271    unsigned int num_cliprects;
 272    drm_clip_rect_t *cliprects;
 273    int x_off, y_off;
 274
 275    if (type == GL_DEPTH || type == GL_STENCIL) {
 276       if (INTEL_DEBUG & DEBUG_FALLBACKS)
 277          fprintf(stderr, "glCopyPixels() fallback: GL_DEPTH || GL_STENCIL\n");
 278       return GL_FALSE;
 279    }
 280
 281    /* Update draw buffer bounds */
 282    _mesa_update_state(ctx);
 283
 284    /* Copypixels can be more than a straight copy.  Ensure all the
 285     * extra operations are disabled:
 286     */
 287    if (!intel_check_copypixel_blit_fragment_ops(ctx) ||
 288        ctx->Pixel.ZoomX != 1.0F || ctx->Pixel.ZoomY != 1.0F)
 289       return GL_FALSE;
 290
 291    if (!src || !dst)
 292       return GL_FALSE;
 293
 294
 295
 296    intelFlush(&intel->ctx);
 297
 298    LOCK_HARDWARE(intel);
 299
 300    intel_get_cliprects(intel, &cliprects, &num_cliprects, &x_off, &y_off);
 301    if (num_cliprects != 0) {
 302       GLint delta_x;
 303       GLint delta_y;
 304       GLint orig_dstx;
 305       GLint orig_dsty;
 306       GLint orig_srcx;
 307       GLint orig_srcy;
 308       GLuint i;
 309
 310       /* XXX: We fail to handle different inversion between read and draw framebuffer. */
 311
 312       /* Clip to destination buffer. */
 313       orig_dstx = dstx;
 314       orig_dsty = dsty;
 315       if (!_mesa_clip_to_region(fb->_Xmin, fb->_Ymin,
 316                                 fb->_Xmax, fb->_Ymax,
 317                                 &dstx, &dsty, &width, &height))
 318          goto out;
 319       /* Adjust src coords for our post-clipped destination origin */
 320       srcx += dstx - orig_dstx;
 321       srcy += dsty - orig_dsty;
 322
 323       /* Clip to source buffer. */
 324       orig_srcx = srcx;
 325       orig_srcy = srcy;
 326       if (!_mesa_clip_to_region(0, 0,
 327                                 read_fb->Width, read_fb->Height,
 328                                 &srcx, &srcy, &width, &height))
 329          goto out;
 330       /* Adjust dst coords for our post-clipped source origin */
 331       dstx += srcx - orig_srcx;
 332       dsty += srcy - orig_srcy;
 333
 334       /* Convert from GL to hardware coordinates:
 335        */
 336       if (fb->Name == 0) {
 337          /* copypixels to a system framebuffer */
 338          dstx = x_off + dstx;
 339          dsty = y_off + (fb->Height - dsty - height);
 340       } else {
 341          /* copypixels to a user framebuffer object */
 342          dstx = x_off + dstx;
 343          dsty = y_off + dsty;
 344       }
 345
 346       /* Flip source Y if it's a system framebuffer. */
 347       if (read_fb->Name == 0) {
 348          srcx = intel->driReadDrawable->x + srcx;
 349          srcy = intel->driReadDrawable->y + (fb->Height - srcy - height);
 350       }
 351
 352       delta_x = srcx - dstx;
 353       delta_y = srcy - dsty;
 354       /* Could do slightly more clipping: Eg, take the intersection of
 355        * the destination cliprects and the read drawable cliprects
 356        *
 357        * This code will not overwrite other windows, but will
 358        * introduce garbage when copying from obscured window regions.
 359        */
 360       for (i = 0; i < num_cliprects; i++) {
 361          GLint clip_x = dstx;
 362          GLint clip_y = dsty;
 363          GLint clip_w = width;
 364          GLint clip_h = height;
 365
 366          if (!_mesa_clip_to_region(cliprects[i].x1, cliprects[i].y1,
 367                                    cliprects[i].x2, cliprects[i].y2,
 368                                    &clip_x, &clip_y, &clip_w, &clip_h))
 369             continue;
 370
 371          if (!intel_region_copy(intel,
 372                                 dst, 0, clip_x, clip_y,
 373                                 src, 0, clip_x + delta_x, clip_y + delta_y,
 374                                 clip_w, clip_h,
 375                                 ctx->Color.ColorLogicOpEnabled ?
 376                                 ctx->Color.LogicOp : GL_COPY)) {
 377             DBG("%s: blit failure\n", __FUNCTION__);
 378             UNLOCK_HARDWARE(intel);
 379             return GL_FALSE;
 380          }
 381       }
 382    }
 383 out:
 384    UNLOCK_HARDWARE(intel);
 385
 386    DBG("%s: success\n", __FUNCTION__);
 387    return GL_TRUE;
 388 }
 389
 390
 391 void
 392 intelCopyPixels(GLcontext * ctx,
 393                 GLint srcx, GLint srcy,
 394                 GLsizei width, GLsizei height,
 395                 GLint destx, GLint desty, GLenum type)
 396 {
 397    if (INTEL_DEBUG & DEBUG_PIXEL)
 398       fprintf(stderr, "%s\n", __FUNCTION__);
 399
 400    if (do_blit_copypixels(ctx, srcx, srcy, width, height, destx, desty, type))
 401       return;
 402
 403 #ifdef I915
 404    if (do_texture_copypixels(ctx, srcx, srcy, width, height, destx, desty, type))
 405       return;
 406 #endif
 407
 408    DBG("fallback to _swrast_CopyPixels\n");
 409
 410    _swrast_CopyPixels(ctx, srcx, srcy, width, height, destx, desty, type);
 411 }