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65 lines
1.9 KiB
65 lines
1.9 KiB
9 months ago
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#include <cstddef>
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#include <benchmark/benchmark.h>
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#include "engine/render/light_render.hpp"
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#include "engine/surface.hpp"
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#include "lighting.h"
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#include "utils/log.hpp"
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#include "utils/paths.h"
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#include "utils/sdl_wrap.h"
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namespace devilution {
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namespace {
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void BM_BuildLightmap(benchmark::State &state)
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{
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std::string benchmarkDataPath = paths::BasePath() + "test/fixtures/light_render_benchmark/dLight.dmp";
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FILE *lightFile = std::fopen(benchmarkDataPath.c_str(), "rb");
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if (lightFile != nullptr) {
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std::fread(&dLight[0][0], sizeof(uint8_t), MAXDUNX * MAXDUNY, lightFile);
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std::fclose(lightFile);
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}
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SDLSurfaceUniquePtr sdl_surface = SDLWrap::CreateRGBSurfaceWithFormat(
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/*flags=*/0, /*width=*/640, /*height=*/480, /*depth=*/8, SDL_PIXELFORMAT_INDEX8);
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if (sdl_surface == nullptr) {
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LogError("Failed to create SDL Surface: {}", SDL_GetError());
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exit(1);
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}
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Surface out = Surface(sdl_surface.get());
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Point tilePosition { 48, 44 };
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Point targetBufferPosition { 0, -17 };
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int viewportWidth = 640;
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int viewportHeight = 352;
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int rows = 25;
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int columns = 10;
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const uint8_t *outBuffer = out.at(0, 0);
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uint16_t outPitch = out.pitch();
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const uint8_t *lightTables = LightTables[0].data();
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size_t lightTableSize = LightTables[0].size();
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size_t numViewportTiles = rows * columns;
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size_t numPixels = viewportWidth * viewportHeight;
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size_t numBytesProcessed = 0;
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size_t numItemsProcessed = 0;
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for (auto _ : state) {
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Lightmap lightmap = Lightmap::build(tilePosition, targetBufferPosition,
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viewportWidth, viewportHeight, rows, columns,
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outBuffer, outPitch, lightTables, lightTableSize);
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uint8_t lightLevel = *lightmap.getLightingAt(outBuffer + outPitch * 120 + 120);
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benchmark::DoNotOptimize(lightLevel);
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numItemsProcessed += numViewportTiles;
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numBytesProcessed += numPixels;
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}
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state.SetBytesProcessed(numBytesProcessed);
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state.SetItemsProcessed(numItemsProcessed);
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}
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BENCHMARK(BM_BuildLightmap);
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} // namespace
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} // namespace devilution
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