コード例 #1
0
ファイル: pixel.c プロジェクト: venkatarajasekhar/Qt
static void GLAPIENTRY
_mesa_GetnPixelMapusvARB( GLenum map, GLsizei bufSize, GLushort *values )
{
    GET_CURRENT_CONTEXT(ctx);
    GLint mapsize, i;
    const struct gl_pixelmap *pm;

    ASSERT_OUTSIDE_BEGIN_END(ctx);

    pm = get_pixelmap(ctx, map);
    if (!pm) {
        _mesa_error(ctx, GL_INVALID_ENUM, "glGetPixelMapusv(map)");
        return;
    }

    mapsize = pm->Size;

    if (!validate_pbo_access(ctx, &ctx->Pack, mapsize, GL_INTENSITY,
                             GL_UNSIGNED_SHORT, bufSize, values)) {
        return;
    }

    values = (GLushort *) _mesa_map_pbo_dest(ctx, &ctx->Pack, values);
    if (!values) {
        if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
            _mesa_error(ctx, GL_INVALID_OPERATION,
                        "glGetPixelMapusv(PBO is mapped)");
        }
        return;
    }

    switch (map) {
    /* special cases */
    case GL_PIXEL_MAP_I_TO_I:
        for (i = 0; i < mapsize; i++) {
            values[i] = (GLushort) CLAMP(ctx->PixelMaps.ItoI.Map[i], 0.0, 65535.);
        }
        break;
    case GL_PIXEL_MAP_S_TO_S:
        for (i = 0; i < mapsize; i++) {
            values[i] = (GLushort) CLAMP(ctx->PixelMaps.StoS.Map[i], 0.0, 65535.);
        }
        break;
    default:
        for (i = 0; i < mapsize; i++) {
            CLAMPED_FLOAT_TO_USHORT(values[i], pm->Map[i] );
        }
    }

    _mesa_unmap_pbo_dest(ctx, &ctx->Pack);
}
コード例 #2
0
/**
 * Software fallback routine for ctx->Driver.ReadPixels().
 * By time we get here, all error checking will have been done.
 */
void
_mesa_readpixels(struct gl_context *ctx,
                 GLint x, GLint y, GLsizei width, GLsizei height,
                 GLenum format, GLenum type,
                 const struct gl_pixelstore_attrib *packing,
                 GLvoid *pixels)
{
   struct gl_pixelstore_attrib clippedPacking = *packing;

   if (ctx->NewState)
      _mesa_update_state(ctx);

   /* Do all needed clipping here, so that we can forget about it later */
   if (_mesa_clip_readpixels(ctx, &x, &y, &width, &height, &clippedPacking)) {

      pixels = _mesa_map_pbo_dest(ctx, &clippedPacking, pixels);

      if (pixels) {
         /* Try memcpy first. */
         if (readpixels_memcpy(ctx, x, y, width, height, format, type,
                               pixels, packing)) {
            _mesa_unmap_pbo_dest(ctx, &clippedPacking);
            return;
         }

         /* Otherwise take the slow path. */
         switch (format) {
         case GL_STENCIL_INDEX:
            read_stencil_pixels(ctx, x, y, width, height, type, pixels,
                                &clippedPacking);
            break;
         case GL_DEPTH_COMPONENT:
            read_depth_pixels(ctx, x, y, width, height, type, pixels,
                              &clippedPacking);
            break;
         case GL_DEPTH_STENCIL_EXT:
            read_depth_stencil_pixels(ctx, x, y, width, height, type, pixels,
                                      &clippedPacking);
            break;
         default:
            /* all other formats should be color formats */
            read_rgba_pixels(ctx, x, y, width, height, format, type, pixels,
                             &clippedPacking);
         }

         _mesa_unmap_pbo_dest(ctx, &clippedPacking);
      }
   }
}
コード例 #3
0
ファイル: pixel.c プロジェクト: venkatarajasekhar/Qt
static void GLAPIENTRY
_mesa_GetnPixelMapuivARB( GLenum map, GLsizei bufSize, GLuint *values )
{
    GET_CURRENT_CONTEXT(ctx);
    GLint mapsize, i;
    const struct gl_pixelmap *pm;

    ASSERT_OUTSIDE_BEGIN_END(ctx);

    pm = get_pixelmap(ctx, map);
    if (!pm) {
        _mesa_error(ctx, GL_INVALID_ENUM, "glGetPixelMapuiv(map)");
        return;
    }

    mapsize = pm->Size;

    if (!validate_pbo_access(ctx, &ctx->Pack, mapsize, GL_INTENSITY,
                             GL_UNSIGNED_INT, bufSize, values)) {
        return;
    }

    values = (GLuint *) _mesa_map_pbo_dest(ctx, &ctx->Pack, values);
    if (!values) {
        if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
            _mesa_error(ctx, GL_INVALID_OPERATION,
                        "glGetPixelMapuiv(PBO is mapped)");
        }
        return;
    }

    if (map == GL_PIXEL_MAP_S_TO_S) {
        /* special case */
        memcpy(values, ctx->PixelMaps.StoS.Map, mapsize * sizeof(GLint));
    }
    else {
        for (i = 0; i < mapsize; i++) {
            values[i] = FLOAT_TO_UINT( pm->Map[i] );
        }
    }

    _mesa_unmap_pbo_dest(ctx, &ctx->Pack);
}
コード例 #4
0
ファイル: pbo.c プロジェクト: ChristophHaag/mesa-mesa
/**
 * Combine PBO-write validation and mapping.
 * If any GL errors are detected, they'll be recorded and NULL returned.
 * \sa _mesa_validate_pbo_access
 * \sa _mesa_map_pbo_dest
 * A call to this function should have a matching call to
 * _mesa_unmap_pbo_dest().
 */
GLvoid *
_mesa_map_validate_pbo_dest(struct gl_context *ctx,
                            GLuint dimensions,
                            const struct gl_pixelstore_attrib *unpack,
                            GLsizei width, GLsizei height, GLsizei depth,
                            GLenum format, GLenum type, GLsizei clientMemSize,
                            GLvoid *ptr, const char *where)
{
   assert(dimensions == 1 || dimensions == 2 || dimensions == 3);

   if (!_mesa_validate_pbo_access(dimensions, unpack, width, height, depth,
                                  format, type, clientMemSize, ptr)) {
      if (_mesa_is_bufferobj(unpack->BufferObj)) {
         _mesa_error(ctx, GL_INVALID_OPERATION,
                     "%s(out of bounds PBO access)", where);
      } else {
         _mesa_error(ctx, GL_INVALID_OPERATION,
                     "%s(out of bounds access: bufSize (%d) is too small)",
                     where, clientMemSize);
      }
      return NULL;
   }

   if (!_mesa_is_bufferobj(unpack->BufferObj)) {
      /* non-PBO access: no further validation to be done */
      return ptr;
   }

   if (_mesa_check_disallowed_mapping(unpack->BufferObj)) {
      /* buffer is already mapped - that's an error */
      _mesa_error(ctx, GL_INVALID_OPERATION, "%s(PBO is mapped)", where);
      return NULL;
   }

   ptr = _mesa_map_pbo_dest(ctx, unpack, ptr);
   return ptr;
}
コード例 #5
0
ファイル: st_cb_readpixels.c プロジェクト: Sheph/mesa
/**
 * This uses a blit to copy the read buffer to a texture format which matches
 * the format and type combo and then a fast read-back is done using memcpy.
 * We can do arbitrary X/Y/Z/W/0/1 swizzling here as long as there is
 * a format which matches the swizzling.
 *
 * If such a format isn't available, we fall back to _mesa_readpixels.
 *
 * NOTE: Some drivers use a blit to convert between tiled and linear
 *       texture layouts during texture uploads/downloads, so the blit
 *       we do here should be free in such cases.
 */
static void
st_readpixels(struct gl_context *ctx, GLint x, GLint y,
              GLsizei width, GLsizei height,
              GLenum format, GLenum type,
              const struct gl_pixelstore_attrib *pack,
              GLvoid *pixels)
{
   struct st_context *st = st_context(ctx);
   struct gl_renderbuffer *rb =
         _mesa_get_read_renderbuffer_for_format(ctx, format);
   struct st_renderbuffer *strb = st_renderbuffer(rb);
   struct pipe_context *pipe = st->pipe;
   struct pipe_screen *screen = pipe->screen;
   struct pipe_resource *src;
   struct pipe_resource *dst = NULL;
   struct pipe_resource dst_templ;
   enum pipe_format dst_format, src_format;
   struct pipe_blit_info blit;
   unsigned bind = PIPE_BIND_TRANSFER_READ;
   struct pipe_transfer *tex_xfer;
   ubyte *map = NULL;

   /* Validate state (to be sure we have up-to-date framebuffer surfaces)
    * and flush the bitmap cache prior to reading. */
   st_validate_state(st);
   st_flush_bitmap_cache(st);

   if (!st->prefer_blit_based_texture_transfer) {
      goto fallback;
   }

   /* This must be done after state validation. */
   src = strb->texture;

   /* XXX Fallback for depth-stencil formats due to an incomplete
    * stencil blit implementation in some drivers. */
   if (format == GL_DEPTH_STENCIL) {
      goto fallback;
   }

   /* We are creating a texture of the size of the region being read back.
    * Need to check for NPOT texture support. */
   if (!screen->get_param(screen, PIPE_CAP_NPOT_TEXTURES) &&
       (!util_is_power_of_two(width) ||
        !util_is_power_of_two(height))) {
      goto fallback;
   }

   /* If the base internal format and the texture format don't match, we have
    * to use the slow path. */
   if (rb->_BaseFormat !=
       _mesa_get_format_base_format(rb->Format)) {
      goto fallback;
   }

   /* See if the texture format already matches the format and type,
    * in which case the memcpy-based fast path will likely be used and
    * we don't have to blit. */
   if (_mesa_format_matches_format_and_type(rb->Format, format,
                                            type, pack->SwapBytes)) {
      goto fallback;
   }

   if (_mesa_readpixels_needs_slow_path(ctx, format, type, GL_TRUE)) {
      goto fallback;
   }

   /* Convert the source format to what is expected by ReadPixels
    * and see if it's supported. */
   src_format = util_format_linear(src->format);
   src_format = util_format_luminance_to_red(src_format);
   src_format = util_format_intensity_to_red(src_format);

   if (!src_format ||
       !screen->is_format_supported(screen, src_format, src->target,
                                    src->nr_samples,
                                    PIPE_BIND_SAMPLER_VIEW)) {
      goto fallback;
   }

   if (format == GL_DEPTH_COMPONENT || format == GL_DEPTH_STENCIL)
      bind |= PIPE_BIND_DEPTH_STENCIL;
   else
      bind |= PIPE_BIND_RENDER_TARGET;

   /* Choose the destination format by finding the best match
    * for the format+type combo. */
   dst_format = st_choose_matching_format(screen, bind, format, type,
                                          pack->SwapBytes);
   if (dst_format == PIPE_FORMAT_NONE) {
      goto fallback;
   }

   /* create the destination texture */
   memset(&dst_templ, 0, sizeof(dst_templ));
   dst_templ.target = PIPE_TEXTURE_2D;
   dst_templ.format = dst_format;
   dst_templ.bind = bind;
   dst_templ.usage = PIPE_USAGE_STAGING;

   st_gl_texture_dims_to_pipe_dims(GL_TEXTURE_2D, width, height, 1,
                                   &dst_templ.width0, &dst_templ.height0,
                                   &dst_templ.depth0, &dst_templ.array_size);

   dst = screen->resource_create(screen, &dst_templ);
   if (!dst) {
      goto fallback;
   }

   memset(&blit, 0, sizeof(blit));
   blit.src.resource = src;
   blit.src.level = strb->surface->u.tex.level;
   blit.src.format = src_format;
   blit.dst.resource = dst;
   blit.dst.level = 0;
   blit.dst.format = dst->format;
   blit.src.box.x = x;
   blit.dst.box.x = 0;
   blit.src.box.y = y;
   blit.dst.box.y = 0;
   blit.src.box.z = strb->surface->u.tex.first_layer;
   blit.dst.box.z = 0;
   blit.src.box.width = blit.dst.box.width = width;
   blit.src.box.height = blit.dst.box.height = height;
   blit.src.box.depth = blit.dst.box.depth = 1;
   blit.mask = st_get_blit_mask(rb->_BaseFormat, format);
   blit.filter = PIPE_TEX_FILTER_NEAREST;
   blit.scissor_enable = FALSE;

   if (st_fb_orientation(ctx->ReadBuffer) == Y_0_TOP) {
      blit.src.box.y = rb->Height - blit.src.box.y;
      blit.src.box.height = -blit.src.box.height;
   }

   /* blit */
   st->pipe->blit(st->pipe, &blit);

   /* map resources */
   pixels = _mesa_map_pbo_dest(ctx, pack, pixels);

   map = pipe_transfer_map_3d(pipe, dst, 0, PIPE_TRANSFER_READ,
                              0, 0, 0, width, height, 1, &tex_xfer);
   if (!map) {
      _mesa_unmap_pbo_dest(ctx, pack);
      pipe_resource_reference(&dst, NULL);
      goto fallback;
   }

   /* memcpy data into a user buffer */
   {
      const uint bytesPerRow = width * util_format_get_blocksize(dst_format);
      GLuint row;

      for (row = 0; row < (unsigned) height; row++) {
         GLvoid *dest = _mesa_image_address3d(pack, pixels,
                                              width, height, format,
                                              type, 0, row, 0);
         memcpy(dest, map, bytesPerRow);
         map += tex_xfer->stride;
      }
   }

   pipe_transfer_unmap(pipe, tex_xfer);
   _mesa_unmap_pbo_dest(ctx, pack);
   pipe_resource_reference(&dst, NULL);
   return;

fallback:
   _mesa_readpixels(ctx, x, y, width, height, format, type, pack, pixels);
}
コード例 #6
0
ファイル: st_cb_texture.c プロジェクト: anupamkaul/mesa
/**
 * glGetTexImage() helper: decompress a compressed texture by rendering
 * a textured quad.  Store the results in the user's buffer.
 */
static void
decompress_with_blit(struct gl_context * ctx,
                     GLenum format, GLenum type, GLvoid *pixels,
                     struct gl_texture_image *texImage)
{
   struct st_context *st = st_context(ctx);
   struct pipe_context *pipe = st->pipe;
   struct st_texture_image *stImage = st_texture_image(texImage);
   struct st_texture_object *stObj = st_texture_object(texImage->TexObject);
   const GLuint width = texImage->Width;
   const GLuint height = texImage->Height;
   struct pipe_resource *dst_texture;
   struct pipe_blit_info blit;
   unsigned bind = (PIPE_BIND_RENDER_TARGET | PIPE_BIND_TRANSFER_READ);
   struct pipe_transfer *tex_xfer;
   ubyte *map;

   /* create temp / dest surface */
   if (!util_create_rgba_texture(pipe, width, height, bind,
                                 &dst_texture)) {
      _mesa_problem(ctx, "util_create_rgba_texture() failed "
                    "in decompress_with_blit()");
      return;
   }

   blit.src.resource = stObj->pt;
   blit.src.level = texImage->Level;
   blit.src.format = util_format_linear(stObj->pt->format);
   blit.dst.resource = dst_texture;
   blit.dst.level = 0;
   blit.dst.format = dst_texture->format;
   blit.src.box.x = blit.dst.box.x = 0;
   blit.src.box.y = blit.dst.box.y = 0;
   blit.src.box.z = 0; /* XXX compressed array textures? */
   blit.dst.box.z = 0;
   blit.src.box.width = blit.dst.box.width = width;
   blit.src.box.height = blit.dst.box.height = height;
   blit.src.box.depth = blit.dst.box.depth = 1;
   blit.mask = PIPE_MASK_RGBA;
   blit.filter = PIPE_TEX_FILTER_NEAREST;
   blit.scissor_enable = FALSE;

   /* blit/render/decompress */
   st->pipe->blit(st->pipe, &blit);

   pixels = _mesa_map_pbo_dest(ctx, &ctx->Pack, pixels);

   map = pipe_transfer_map(pipe, dst_texture, 0, 0,
                           PIPE_TRANSFER_READ,
                           0, 0, width, height, &tex_xfer);
   if (!map) {
      goto end;
   }

   /* copy/pack data into user buffer */
   if (_mesa_format_matches_format_and_type(stImage->base.TexFormat,
                                            format, type,
                                            ctx->Pack.SwapBytes)) {
      /* memcpy */
      const uint bytesPerRow = width * util_format_get_blocksize(stImage->pt->format);
      /* map the dst_surface so we can read from it */
      GLuint row;
      for (row = 0; row < height; row++) {
         GLvoid *dest = _mesa_image_address2d(&ctx->Pack, pixels, width,
                                              height, format, type, row, 0);
         memcpy(dest, map, bytesPerRow);
         map += tex_xfer->stride;
      }
      pipe_transfer_unmap(pipe, tex_xfer);
   }
   else {
      /* format translation via floats */
      GLuint row;
      enum pipe_format pformat = util_format_linear(dst_texture->format);
      GLfloat *rgba;

      rgba = malloc(width * 4 * sizeof(GLfloat));
      if (!rgba) {
         _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage()");
         goto end;
      }

      for (row = 0; row < height; row++) {
         const GLbitfield transferOps = 0x0; /* bypassed for glGetTexImage() */
         GLvoid *dest = _mesa_image_address2d(&ctx->Pack, pixels, width,
                                              height, format, type, row, 0);

         if (ST_DEBUG & DEBUG_FALLBACK)
            debug_printf("%s: fallback format translation\n", __FUNCTION__);

         /* get float[4] rgba row from surface */
         pipe_get_tile_rgba_format(tex_xfer, map, 0, row, width, 1,
                                   pformat, rgba);

         _mesa_pack_rgba_span_float(ctx, width, (GLfloat (*)[4]) rgba, format,
                                    type, dest, &ctx->Pack, transferOps);
      }

      free(rgba);
   }

end:
   if (map)
      pipe_transfer_unmap(pipe, tex_xfer);

   _mesa_unmap_pbo_dest(ctx, &ctx->Pack);
   pipe_resource_reference(&dst_texture, NULL);
}
コード例 #7
0
/**
 * glGetTexImage() helper: decompress a compressed texture by rendering
 * a textured quad.  Store the results in the user's buffer.
 */
static void
decompress_with_blit(struct gl_context * ctx,
                     GLenum format, GLenum type, GLvoid *pixels,
                     struct gl_texture_image *texImage)
{
   struct st_context *st = st_context(ctx);
   struct pipe_context *pipe = st->pipe;
   struct st_texture_image *stImage = st_texture_image(texImage);
   struct st_texture_object *stObj = st_texture_object(texImage->TexObject);
   struct pipe_sampler_view *src_view;
   const GLuint width = texImage->Width;
   const GLuint height = texImage->Height;
   struct pipe_surface *dst_surface;
   struct pipe_resource *dst_texture;
   struct pipe_transfer *tex_xfer;
   unsigned bind = (PIPE_BIND_RENDER_TARGET | /* util_blit may choose to render */
		    PIPE_BIND_TRANSFER_READ);

   /* create temp / dest surface */
   if (!util_create_rgba_surface(pipe, width, height, bind,
                                 &dst_texture, &dst_surface)) {
      _mesa_problem(ctx, "util_create_rgba_surface() failed "
                    "in decompress_with_blit()");
      return;
   }

   /* Disable conditional rendering. */
   if (st->render_condition) {
      pipe->render_condition(pipe, NULL, 0);
   }

   /* Create sampler view that limits fetches to the source mipmap level */
   {
      struct pipe_sampler_view sv_temp;

      u_sampler_view_default_template(&sv_temp, stObj->pt, stObj->pt->format);

      sv_temp.format = util_format_linear(sv_temp.format);
      sv_temp.u.tex.first_level =
      sv_temp.u.tex.last_level = texImage->Level;

      src_view = pipe->create_sampler_view(pipe, stObj->pt, &sv_temp);
      if (!src_view) {
         _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage");
         return;
      }
   }

   /* blit/render/decompress */
   util_blit_pixels_tex(st->blit,
                        src_view,      /* pipe_resource (src) */
                        0, 0,             /* src x0, y0 */
                        width, height,    /* src x1, y1 */
                        dst_surface,      /* pipe_surface (dst) */
                        0, 0,             /* dst x0, y0 */
                        width, height,    /* dst x1, y1 */
                        0.0,              /* z */
                        PIPE_TEX_MIPFILTER_NEAREST);

   /* Restore conditional rendering state. */
   if (st->render_condition) {
      pipe->render_condition(pipe, st->render_condition,
                             st->condition_mode);
   }

   /* map the dst_surface so we can read from it */
   tex_xfer = pipe_get_transfer(pipe,
                                dst_texture, 0, 0,
                                PIPE_TRANSFER_READ,
                                0, 0, width, height);

   pixels = _mesa_map_pbo_dest(ctx, &ctx->Pack, pixels);

   /* copy/pack data into user buffer */
   if (_mesa_format_matches_format_and_type(stImage->base.TexFormat,
                                            format, type,
                                            ctx->Pack.SwapBytes)) {
      /* memcpy */
      const uint bytesPerRow = width * util_format_get_blocksize(stImage->pt->format);
      ubyte *map = pipe_transfer_map(pipe, tex_xfer);
      GLuint row;
      for (row = 0; row < height; row++) {
         GLvoid *dest = _mesa_image_address2d(&ctx->Pack, pixels, width,
                                              height, format, type, row, 0);
         memcpy(dest, map, bytesPerRow);
         map += tex_xfer->stride;
      }
      pipe_transfer_unmap(pipe, tex_xfer);
   }
   else {
      /* format translation via floats */
      GLuint row;
      enum pipe_format pformat = util_format_linear(dst_texture->format);
      GLfloat *rgba;

      rgba = (GLfloat *) malloc(width * 4 * sizeof(GLfloat));
      if (!rgba) {
         _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage()");
         goto end;
      }

      for (row = 0; row < height; row++) {
         const GLbitfield transferOps = 0x0; /* bypassed for glGetTexImage() */
         GLvoid *dest = _mesa_image_address2d(&ctx->Pack, pixels, width,
                                              height, format, type, row, 0);

         if (ST_DEBUG & DEBUG_FALLBACK)
            debug_printf("%s: fallback format translation\n", __FUNCTION__);

         /* get float[4] rgba row from surface */
         pipe_get_tile_rgba_format(pipe, tex_xfer, 0, row, width, 1,
                                   pformat, rgba);

         _mesa_pack_rgba_span_float(ctx, width, (GLfloat (*)[4]) rgba, format,
                                    type, dest, &ctx->Pack, transferOps);
      }

      free(rgba);
   }

end:
   _mesa_unmap_pbo_dest(ctx, &ctx->Pack);

   pipe->transfer_destroy(pipe, tex_xfer);

   /* destroy the temp / dest surface */
   util_destroy_rgba_surface(dst_texture, dst_surface);

   pipe_sampler_view_release(pipe, &src_view);
}