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Reduce number of rand function calls.

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This commit is contained in:
Sergey Lipskiy 2017-02-19 14:46:47 +07:00
parent 5b3b2920bc
commit 3da71d1fc4
1 changed files with 8 additions and 5 deletions
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13
src/NoiseTexture.cpp
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@ -22,6 +22,9 @@ void NoiseTexture::init()
{ {
if (config.generalEmulation.enableNoise == 0) if (config.generalEmulation.enableNoise == 0)
return; return;
std::vector<u16> ptr(640 * 580 / 2);
for (u32 i = 0; i < NOISE_TEX_NUM; ++i) { for (u32 i = 0; i < NOISE_TEX_NUM; ++i) {
m_pTexture[i] = textureCache().addFrameBufferTexture(false); m_pTexture[i] = textureCache().addFrameBufferTexture(false);
m_pTexture[i]->format = G_IM_FMT_RGBA; m_pTexture[i]->format = G_IM_FMT_RGBA;
@ -57,17 +60,17 @@ void NoiseTexture::init()
params.magFilter = textureParameters::FILTER_NEAREST; params.magFilter = textureParameters::FILTER_NEAREST;
gfxContext.setTextureParameters(params); gfxContext.setTextureParameters(params);
} }
std::vector<u8> ptr(m_pTexture[i]->textureBytes); const u32 widthWords = m_pTexture[i]->realWidth / 2;
for (u32 y = 0; y < m_pTexture[i]->realHeight; ++y) { for (u32 y = 0; y < m_pTexture[i]->realHeight; ++y) {
for (u32 x = 0; x < m_pTexture[i]->realWidth; ++x) for (u32 x = 0; x < widthWords; ++x)
ptr[x + y*m_pTexture[i]->realWidth] = rand() & 0xFF; ptr[x + y*widthWords] = rand() & 0xFFFF;
} }
{ {
Context::UpdateTextureDataParams params; Context::UpdateTextureDataParams params;
params.handle = m_pTexture[i]->name; params.handle = m_pTexture[i]->name;
params.textureUnitIndex = textureIndices::NoiseTex; params.textureUnitIndex = textureIndices::NoiseTex;
params.width = 640; params.width = m_pTexture[i]->realWidth;
params.height = 580; params.height = m_pTexture[i]->realHeight;
params.format = fbTexFormats.noiseFormat; params.format = fbTexFormats.noiseFormat;
params.dataType = fbTexFormats.noiseType; params.dataType = fbTexFormats.noiseType;
params.data = ptr.data(); params.data = ptr.data();