src/mesa/drivers/dri/i965/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 "mtypes.h"
  32 #include "macros.h"
  33 #include "state.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_blit.h"
  41 #include "intel_regions.h"
  42 #include "intel_buffers.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
  76 /**
  77  * Check if any fragment operations are in effect which might effect
  78  * glDraw/CopyPixels.
  79  */
  80 GLboolean
  81 intel_check_blit_fragment_ops(GLcontext * ctx)
  82 {
  83    if (ctx->NewState)
  84       _mesa_update_state(ctx);
  85
  86    return !(ctx->_ImageTransferState ||
  87             ctx->RenderMode != GL_RENDER ||
  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] || /* can do this! */
  96             ctx->Texture._EnabledUnits ||
  97             ctx->FragmentProgram._Enabled ||
  98             ctx->Color.BlendEnabled);
  99 }
 100
 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        ctx->_ImageTransferState ||
 121        ctx->Pixel.ZoomX != 1.0F || ctx->Pixel.ZoomY != 1.0F ||
 122        ctx->RenderMode != GL_RENDER ||
 123        ctx->Texture._EnabledUnits ||
 124        ctx->FragmentProgram._Enabled ||
 125        src != dst )
 126        return GL_FALSE;
 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 - 1;
 142       srcbox.y2 = srcy + height - 1;
 143
 144       dstbox.x1 = dstx;
 145       dstbox.y1 = dsty;
 146       dstbox.x2 = dstx + width - 1;
 147       dstbox.y2 = dsty + height - 1;
 148
 149       DBG("src %d,%d %d,%d\n", srcbox.x1, srcbox.y1, srcbox.x2, srcbox.y2);
 150       DBG("dst %d,%d %d,%d (%dx%d) (%f,%f)\n", dstbox.x1, dstbox.y1, dstbox.x2, dstbox.y2,
 151           width, height, ctx->Pixel.ZoomX, ctx->Pixel.ZoomY);
 152
 153       if (intel_intersect_cliprects(&tmp, &srcbox, &dstbox)) {
 154          DBG("%s: regions overlap\n", __FUNCTION__);
 155          return GL_FALSE;
 156       }
 157    }
 158
 159    intelFlush(&intel->ctx);
 160
 161    intel->vtbl.install_meta_state(intel);
 162
 163    /* Is this true?  Also will need to turn depth testing on according
 164     * to state:
 165     */
 166    intel->vtbl.meta_no_stencil_write(intel);
 167    intel->vtbl.meta_no_depth_write(intel);
 168
 169    /* Set the 3d engine to draw into the destination region:
 170     */
 171    intel->vtbl.meta_draw_region(intel, dst, intel->depth_region);
 172
 173    intel->vtbl.meta_import_pixel_state(intel);
 174
 175    if (src->cpp == 2) {
 176       src_format = GL_RGB;
 177       src_type = GL_UNSIGNED_SHORT_5_6_5;
 178    }
 179    else {
 180       src_format = GL_BGRA;
 181       src_type = GL_UNSIGNED_BYTE;
 182    }
 183
 184    /* Set the frontbuffer up as a large rectangular texture.
 185     */
 186    intel->vtbl.meta_frame_buffer_texture( intel, srcx - dstx, srcy - dsty );
 187
 188    intel->vtbl.meta_texture_blend_replace(intel);
 189
 190    if (intel->driDrawable->numClipRects)
 191       intel->vtbl.meta_draw_quad( intel,
 192                                   dstx, dstx + width,
 193                                   dsty, dsty + height,
 194                                   ctx->Current.RasterPos[ 2 ],
 195                                   0, 0.0, 0.0, 0.0, 0.0 );
 196
 197    intel->vtbl.leave_meta_state( intel );
 198
 199    DBG("%s: success\n", __FUNCTION__);
 200    return GL_TRUE;
 201 }
 202
 203 /**
 204  * CopyPixels with the blitter.  Don't support zooming, pixel transfer, etc.
 205  */
 206 static GLboolean
 207 do_blit_copypixels(GLcontext * ctx,
 208                    GLint srcx, GLint srcy,
 209                    GLsizei width, GLsizei height,
 210                    GLint dstx, GLint dsty, GLenum type)
 211 {
 212    struct intel_context *intel = intel_context(ctx);
 213    struct intel_region *dst = intel_drawbuf_region(intel);
 214    struct intel_region *src = copypix_src_region(intel, type);
 215
 216    /* Copypixels can be more than a straight copy.  Ensure all the
 217     * extra operations are disabled:
 218     */
 219    if (!intel_check_blit_fragment_ops(ctx) ||
 220        ctx->Pixel.ZoomX != 1.0F || ctx->Pixel.ZoomY != 1.0F)
 221       return GL_FALSE;
 222
 223    if (!src || !dst)
 224       return GL_FALSE;
 225
 226
 227
 228    intelFlush(&intel->ctx);
 229
 230 /*    intel->vtbl.render_start(intel); */
 231 /*    intel->vtbl.emit_state(intel); */
 232
 233    LOCK_HARDWARE(intel);
 234
 235    if (intel->driDrawable->numClipRects) {
 236       __DRIdrawablePrivate *dPriv = intel->driDrawable;
 237       __DRIdrawablePrivate *dReadPriv = intel->driReadDrawable;
 238       drm_clip_rect_t *box = dPriv->pClipRects;
 239       drm_clip_rect_t dest_rect;
 240       GLint nbox = dPriv->numClipRects;
 241       GLint delta_x = 0;
 242       GLint delta_y = 0;
 243       GLuint i;
 244
 245       /* Do scissoring in GL coordinates:
 246        */
 247       if (ctx->Scissor.Enabled)
 248       {
 249          GLint x = ctx->Scissor.X;
 250          GLint y = ctx->Scissor.Y;
 251          GLuint w = ctx->Scissor.Width;
 252          GLuint h = ctx->Scissor.Height;
 253          GLint dx = dstx - srcx;
 254          GLint dy = dsty - srcy;
 255
 256          if (!_mesa_clip_to_region(x, y, x+w-1, y+h-1, &dstx, &dsty, &width, &height))
 257             goto out;
 258
 259          srcx = dstx - dx;
 260          srcy = dsty - dy;
 261       }
 262
 263       /* Convert from GL to hardware coordinates:
 264        */
 265       dsty = dPriv->h - dsty - height;
 266       srcy = dPriv->h - srcy - height;
 267       dstx += dPriv->x;
 268       dsty += dPriv->y;
 269       srcx += dReadPriv->x;
 270       srcy += dReadPriv->y;
 271
 272       /* Clip against the source region.  This is the only source
 273        * clipping we do.  Dst is clipped with cliprects below.
 274        */
 275       {
 276          delta_x = srcx - dstx;
 277          delta_y = srcy - dsty;
 278
 279          if (!_mesa_clip_to_region(0, 0, src->pitch, src->height,
 280                                    &srcx, &srcy, &width, &height))
 281             goto out;
 282
 283          dstx = srcx - delta_x;
 284          dsty = srcy - delta_y;
 285       }
 286
 287       dest_rect.x1 = dstx;
 288       dest_rect.y1 = dsty;
 289       dest_rect.x2 = dstx + width;
 290       dest_rect.y2 = dsty + height;
 291
 292 /*       intel->vtbl.emit_flush(intel, 0); */
 293
 294       /* Could do slightly more clipping: Eg, take the intersection of
 295        * the existing set of cliprects and those cliprects translated
 296        * by delta_x, delta_y:
 297        *
 298        * This code will not overwrite other windows, but will
 299        * introduce garbage when copying from obscured window regions.
 300        */
 301       for (i = 0; i < nbox; i++) {
 302          drm_clip_rect_t rect;
 303
 304          if (!intel_intersect_cliprects(&rect, &dest_rect, &box[i]))
 305             continue;
 306
 307
 308          intelEmitCopyBlit(intel,
 309                            dst->cpp,
 310                            src->pitch, src->buffer, 0, src->tiled,
 311                            dst->pitch, dst->buffer, 0, dst->tiled,
 312                            rect.x1 + delta_x,
 313                            rect.y1 + delta_y,       /* srcx, srcy */
 314                            rect.x1, rect.y1,    /* dstx, dsty */
 315                            rect.x2 - rect.x1, rect.y2 - rect.y1,
 316                            ctx->Color.ColorLogicOpEnabled ?
 317                            ctx->Color.LogicOp : GL_COPY);
 318       }
 319
 320    out:
 321       intel_batchbuffer_flush(intel->batch);
 322    }
 323    UNLOCK_HARDWARE(intel);
 324    return GL_TRUE;
 325 }
 326
 327 void
 328 intelCopyPixels(GLcontext * ctx,
 329                 GLint srcx, GLint srcy,
 330                 GLsizei width, GLsizei height,
 331                 GLint destx, GLint desty, GLenum type)
 332 {
 333    if (INTEL_DEBUG & DEBUG_PIXEL)
 334       fprintf(stderr, "%s\n", __FUNCTION__);
 335
 336    if (do_blit_copypixels(ctx, srcx, srcy, width, height, destx, desty, type))
 337       return;
 338
 339    if (do_texture_copypixels(ctx, srcx, srcy, width, height, destx, desty, type))
 340       return;
 341
 342    if (INTEL_DEBUG & DEBUG_PIXEL)
 343       _mesa_printf("fallback to _swrast_CopyPixels\n");
 344
 345    _swrast_CopyPixels(ctx, srcx, srcy, width, height, destx, desty, type);
 346 }