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Check for low GPU memory and try to disable cache.

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This may help with phones and even desktops without much VRAM/RAM.
Normally OpenGL will copy between them, though, so it should not happen
often, especially not on desktops.
This commit is contained in:
Unknown W. Brackets 2013-05-05 00:00:22 -07:00
parent 5b970d76e3
commit bd692ddf66
2 changed files with 15 additions and 4 deletions
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18
GPU/GLES/TextureCache.cpp
View File

@ -30,7 +30,8 @@
// If a texture hasn't been seen for this many frames, get rid of it.
#define TEXTURE_KILL_AGE 200
#define TEXTURE_KILL_AGE_LOWMEM 60
// Not used in lowmem mode.
#define TEXTURE_SECOND_KILL_AGE 100
u32 RoundUpToPowerOf2(u32 v)
@ -45,7 +46,7 @@ u32 RoundUpToPowerOf2(u32 v)
return v;
}
TextureCache::TextureCache() : clearCacheNextFrame_(false) {
TextureCache::TextureCache() : clearCacheNextFrame_(false), lowMemoryMode_(false) {
lastBoundTexture = -1;
// This is 5MB of temporary storage. Might be possible to shrink it.
tmpTexBuf32.resize(1024 * 512); // 2MB
@ -84,6 +85,7 @@ void TextureCache::Clear(bool delete_them) {
// Removes old textures.
void TextureCache::Decimate() {
glBindTexture(GL_TEXTURE_2D, 0);
int killAge = lowMemoryMode_ ? TEXTURE_KILL_AGE_LOWMEM : TEXTURE_KILL_AGE;
for (TexCache::iterator iter = cache.begin(); iter != cache.end(); ) {
if (iter->second.lastFrame + TEXTURE_KILL_AGE < gpuStats.numFrames) {
glDeleteTextures(1, &iter->second.texture);
@ -93,7 +95,7 @@ void TextureCache::Decimate() {
++iter;
}
for (TexCache::iterator iter = secondCache.begin(); iter != secondCache.end(); ) {
if (iter->second.lastFrame + TEXTURE_KILL_AGE < gpuStats.numFrames) {
if (lowMemoryMode_ || iter->second.lastFrame + TEXTURE_KILL_AGE < gpuStats.numFrames) {
glDeleteTextures(1, &iter->second.texture);
secondCache.erase(iter++);
}
@ -854,7 +856,7 @@ void TextureCache::SetTexture() {
// Don't give up just yet. Let's try the secondary cache if it's been invalidated before.
// If it's failed a bunch of times, then the second cache is just wasting time and VRAM.
if (entry->numInvalidated > 2 && entry->numInvalidated < 128) {
if (entry->numInvalidated > 2 && entry->numInvalidated < 128 && !lowMemoryMode_) {
u64 secondKey = check | (u64)cluthash << 32;
TexCache::iterator secondIter = secondCache.find(secondKey);
if (secondIter != secondCache.end()) {
@ -1282,6 +1284,14 @@ void TextureCache::LoadTextureLevel(TexCacheEntry &entry, int level) {
GLuint components = dstFmt == GL_UNSIGNED_SHORT_5_6_5 ? GL_RGB : GL_RGBA;
glTexImage2D(GL_TEXTURE_2D, level, components, w, h, 0, components, dstFmt, pixelData);
GLenum err = glGetError();
if (err == GL_OUT_OF_MEMORY) {
lowMemoryMode_ = true;
Decimate();
// Try again.
glTexImage2D(GL_TEXTURE_2D, level, components, w, h, 0, components, dstFmt, pixelData);
}
}
// Only used by Qt UI?

1
GPU/GLES/TextureCache.h
View File

@ -108,6 +108,7 @@ private:
TexCache secondCache;
bool clearCacheNextFrame_;
bool lowMemoryMode_;
TextureScaler scaler;
SimpleBuf<u32> tmpTexBuf32;