Caching the result of readPixelsSupported
The call was calling GR_GL_GetIntegerv 2 times for each readPixels
and thus was causing a loss of performance
(resubmit of issue 344793008)
Benchmark url: http://packages.gkny.fr/tst/index.html
BUG=skia:2681
Committed: https://skia.googlesource.com/skia/+/753a2964afe5661ce9b2a8ca77ca9d0aabd3173c
Committed: https://skia.googlesource.com/skia/+/8339371f1ec3c57a0741932fd96bff32c53d4e54
Review URL: https://codereview.chromium.org/364193004
diff --git a/src/gpu/gl/GrGLCaps.cpp b/src/gpu/gl/GrGLCaps.cpp
index dc4ef4c..2fe3847 100644
--- a/src/gpu/gl/GrGLCaps.cpp
+++ b/src/gpu/gl/GrGLCaps.cpp
@@ -50,6 +50,8 @@
fFBFetchSupport = false;
fFBFetchColorName = NULL;
fFBFetchExtensionString = NULL;
+
+ fReadPixelsSupportedCache.reset();
}
GrGLCaps::GrGLCaps(const GrGLCaps& caps) : GrDrawTargetCaps() {
@@ -582,7 +584,7 @@
}
// Check for ASTC
- fConfigTextureSupport[kASTC_12x12_GrPixelConfig] =
+ fConfigTextureSupport[kASTC_12x12_GrPixelConfig] =
ctxInfo.hasExtension("GL_KHR_texture_compression_astc_hdr") ||
ctxInfo.hasExtension("GL_KHR_texture_compression_astc_ldr") ||
ctxInfo.hasExtension("GL_OES_texture_compression_astc");
@@ -601,9 +603,9 @@
fConfigTextureSupport[kRGBA_float_GrPixelConfig] = hasFPTextures;
}
-bool GrGLCaps::readPixelsSupported(const GrGLInterface* intf,
- GrGLenum format,
- GrGLenum type) const {
+bool GrGLCaps::doReadPixelsSupported(const GrGLInterface* intf,
+ GrGLenum format,
+ GrGLenum type) const {
if (GR_GL_RGBA == format && GR_GL_UNSIGNED_BYTE == type) {
// ES 2 guarantees this format is supported
return true;
@@ -630,6 +632,26 @@
return (GrGLenum)otherFormat == format && (GrGLenum)otherType == type;
}
+bool GrGLCaps::readPixelsSupported(const GrGLInterface* intf,
+ GrGLenum format,
+ GrGLenum type,
+ GrGLenum currFboFormat) const {
+
+ ReadPixelsSupportedFormats::Key key = {format, type, currFboFormat};
+
+ ReadPixelsSupportedFormats* cachedValue = fReadPixelsSupportedCache.find(key);
+
+ if (NULL == cachedValue) {
+ bool value = doReadPixelsSupported(intf, format, type);
+ ReadPixelsSupportedFormats newValue(key, value);
+ fReadPixelsSupportedCache.add(newValue);
+
+ return newValue.value();
+ }
+
+ return cachedValue->value();
+}
+
void GrGLCaps::initFSAASupport(const GrGLContextInfo& ctxInfo, const GrGLInterface* gli) {
fMSFBOType = kNone_MSFBOType;