gfx/wr/webrender/res/gpu_buffer.glsl

   1 /* This Source Code Form is subject to the terms of the Mozilla Public
   2  * License, v. 2.0. If a copy of the MPL was not distributed with this
   3  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   4
   5 uniform HIGHP_SAMPLER_FLOAT sampler2D sGpuBufferF;
   6 uniform HIGHP_SAMPLER_FLOAT isampler2D sGpuBufferI;
   7
   8 ivec2 get_gpu_buffer_uv(HIGHP_FS_ADDRESS int address) {
   9     return ivec2(uint(address) % WR_MAX_VERTEX_TEXTURE_WIDTH,
  10                  uint(address) / WR_MAX_VERTEX_TEXTURE_WIDTH);
  11 }
  12
  13 vec4 fetch_from_gpu_buffer_1f(HIGHP_FS_ADDRESS int address) {
  14     ivec2 uv = get_gpu_buffer_uv(address);
  15     return texelFetch(sGpuBufferF, uv, 0);
  16 }
  17
  18 vec4[2] fetch_from_gpu_buffer_2f(HIGHP_FS_ADDRESS int address) {
  19     ivec2 uv = get_gpu_buffer_uv(address);
  20     return vec4[2](
  21         TEXEL_FETCH(sGpuBufferF, uv, 0, ivec2(0, 0)),
  22         TEXEL_FETCH(sGpuBufferF, uv, 0, ivec2(1, 0))
  23     );
  24 }
  25
  26 vec4[3] fetch_from_gpu_buffer_3f(HIGHP_FS_ADDRESS int address) {
  27     ivec2 uv = get_gpu_buffer_uv(address);
  28     return vec4[3](
  29         TEXEL_FETCH(sGpuBufferF, uv, 0, ivec2(0, 0)),
  30         TEXEL_FETCH(sGpuBufferF, uv, 0, ivec2(1, 0)),
  31         TEXEL_FETCH(sGpuBufferF, uv, 0, ivec2(2, 0))
  32     );
  33 }
  34
  35 vec4[4] fetch_from_gpu_buffer_4f(HIGHP_FS_ADDRESS int address) {
  36     ivec2 uv = get_gpu_buffer_uv(address);
  37     return vec4[4](
  38         TEXEL_FETCH(sGpuBufferF, uv, 0, ivec2(0, 0)),
  39         TEXEL_FETCH(sGpuBufferF, uv, 0, ivec2(1, 0)),
  40         TEXEL_FETCH(sGpuBufferF, uv, 0, ivec2(2, 0)),
  41         TEXEL_FETCH(sGpuBufferF, uv, 0, ivec2(3, 0))
  42     );
  43 }
  44
  45 ivec4 fetch_from_gpu_buffer_1i(HIGHP_FS_ADDRESS int address) {
  46     ivec2 uv = get_gpu_buffer_uv(address);
  47     return texelFetch(sGpuBufferI, uv, 0);
  48 }