glNamedBufferStorage(output_ssbo, 45 * 64 * 1024, nullptr, GL_MAP_READ_BIT | GL_MAP_PERSISTENT_BIT);
check_error();
glNamedBufferStorage(output_ssbo, 45 * 64 * 1024, nullptr, GL_MAP_READ_BIT | GL_MAP_PERSISTENT_BIT);
check_error();
- GLuint output_offset_ssbo;
- glGenBuffers(1, &output_offset_ssbo);
- glBindBuffer(GL_SHADER_STORAGE_BUFFER, output_offset_ssbo);
- glNamedBufferStorage(output_offset_ssbo, 45 * 64 * sizeof(uint32_t), nullptr, GL_MAP_READ_BIT | GL_MAP_PERSISTENT_BIT);
+ GLuint bytes_written_ssbo;
+ glGenBuffers(1, &bytes_written_ssbo);
+ glBindBuffer(GL_SHADER_STORAGE_BUFFER, bytes_written_ssbo);
+ glNamedBufferStorage(bytes_written_ssbo, 45 * 64 * sizeof(uint32_t), nullptr, GL_MAP_READ_BIT | GL_MAP_PERSISTENT_BIT);
glUseProgram(glsl_rans_program_num);
glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 10, output_ssbo);
glUseProgram(glsl_rans_program_num);
glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 10, output_ssbo);
glBindBufferBase(GL_UNIFORM_BUFFER, 13, dist_ubo);
glUseProgram(glsl_program_num);
glBindBufferBase(GL_UNIFORM_BUFFER, 13, dist_ubo);
glUseProgram(glsl_program_num);
- const uint32_t *offsets = (const uint32_t *)glMapNamedBufferRange(output_offset_ssbo, 0, 45 * 64 * sizeof(uint32_t), GL_MAP_READ_BIT | GL_MAP_PERSISTENT_BIT);
+ const uint32_t *bytes_written = (const uint32_t *)glMapNamedBufferRange(bytes_written_ssbo, 0, 45 * 64 * sizeof(uint32_t), GL_MAP_READ_BIT | GL_MAP_PERSISTENT_BIT);
#if 0
for (int i = 0; i < 45*64; ++i) {
printf("%d,%d,%d: %u\n", i / 64, (i / 8) % 8, i % 8, 1024 * (i + 1) - offsets[i]);
#if 0
for (int i = 0; i < 45*64; ++i) {
printf("%d,%d,%d: %u\n", i / 64, (i / 8) % 8, i % 8, 1024 * (i + 1) - offsets[i]);
for (unsigned x = 0; x < 8; ++x) {
for (unsigned int stream_idx = 0; stream_idx < 45; ++stream_idx) {
const uint8_t *out_end = data + (stream_idx * 64 + y * 8 + x + 1) * 1024;
for (unsigned x = 0; x < 8; ++x) {
for (unsigned int stream_idx = 0; stream_idx < 45; ++stream_idx) {
const uint8_t *out_end = data + (stream_idx * 64 + y * 8 + x + 1) * 1024;
- const uint8_t *ptr = data + offsets[stream_idx * 64 + y * 8 + x];
- uint32_t num_rans_bytes = out_end - ptr;
+ uint32_t num_rans_bytes = bytes_written[stream_idx * 64 + y * 8 + x];
+ const uint8_t *ptr = out_end - num_rans_bytes;