Move renderable config list to GrDrawTargetCaps
R=robertphillips@google.com
Author: bsalomon@google.com
Review URL: https://codereview.chromium.org/26342006
git-svn-id: http://skia.googlecode.com/svn/trunk@11756 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/gpu/gl/GrGLCaps.cpp b/src/gpu/gl/GrGLCaps.cpp
index 17a4743..eb0b245 100644
--- a/src/gpu/gl/GrGLCaps.cpp
+++ b/src/gpu/gl/GrGLCaps.cpp
@@ -334,6 +334,67 @@
} else if (GrGLCaps::kNone_MSFBOType != fMSFBOType) {
GR_GL_GetIntegerv(gli, GR_GL_MAX_SAMPLES, &fMaxSampleCount);
}
+
+ this->initConfigRenderableTable(ctxInfo);
+}
+
+void GrGLCaps::initConfigRenderableTable(const GrGLContextInfo& ctxInfo) {
+
+ // OpenGL < 3.0
+ // no support for render targets unless the GL_ARB_framebuffer_object
+ // extension is supported (in which case we get ALPHA, RED, RG, RGB,
+ // RGBA (ALPHA8, RGBA4, RGBA8) for OpenGL > 1.1). Note that we
+ // probably don't get R8 in this case.
+
+ // OpenGL 3.0
+ // base color renderable: ALPHA, RED, RG, RGB, and RGBA
+ // sized derivatives: ALPHA8, R8, RGBA4, RGBA8
+
+ // >= OpenGL 3.1
+ // base color renderable: RED, RG, RGB, and RGBA
+ // sized derivatives: R8, RGBA4, RGBA8
+ // if the GL_ARB_compatibility extension is supported then we get back
+ // support for GL_ALPHA and ALPHA8
+
+ // GL_EXT_bgra adds BGRA render targets to any version
+
+ // ES 2.0
+ // color renderable: RGBA4, RGB5_A1, RGB565
+ // GL_EXT_texture_rg adds support for R8 as a color render target
+ // GL_OES_rgb8_rgba8 and/or GL_ARM_rgba8 adds support for RGBA8
+ // GL_EXT_texture_format_BGRA8888 and/or GL_APPLE_texture_format_BGRA8888 added BGRA support
+
+ // ES 3.0
+ // Same as ES 2.0 except R8 and RGBA8 are supported without extensions (the functions called
+ // below already account for this).
+
+ if (kDesktop_GrGLBinding == ctxInfo.binding()) {
+ // Post 3.0 we will get R8
+ // Prior to 3.0 we will get ALPHA8 (with GL_ARB_framebuffer_object)
+ if (ctxInfo.version() >= GR_GL_VER(3,0) ||
+ ctxInfo.hasExtension("GL_ARB_framebuffer_object")) {
+ fConfigRenderSupport[kAlpha_8_GrPixelConfig] = true;
+ }
+ } else {
+ // On ES we can only hope for R8
+ fConfigRenderSupport[kAlpha_8_GrPixelConfig] = fTextureRedSupport;
+ }
+
+ if (kDesktop_GrGLBinding != ctxInfo.binding()) {
+ // only available in ES
+ fConfigRenderSupport[kRGB_565_GrPixelConfig] = true;
+ }
+
+ // we no longer support 444 as a render target
+ fConfigRenderSupport[kRGBA_4444_GrPixelConfig] = false;
+
+ if (this->fRGBA8RenderbufferSupport) {
+ fConfigRenderSupport[kRGBA_8888_GrPixelConfig] = true;
+ }
+
+ if (this->fBGRAFormatSupport) {
+ fConfigRenderSupport[kBGRA_8888_GrPixelConfig] = true;
+ }
}
bool GrGLCaps::readPixelsSupported(const GrGLInterface* intf,