flip Y in uploads to bottom-up textures (and add gm test)
Review URL: http://codereview.appspot.com/4756043/
git-svn-id: http://skia.googlecode.com/svn/trunk@1882 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gm/texdata.cpp b/gm/texdata.cpp
new file mode 100644
index 0000000..e1ad4b3
--- /dev/null
+++ b/gm/texdata.cpp
@@ -0,0 +1,139 @@
+#include "gm.h"
+#include "GrContext.h"
+#include "SkColorPriv.h"
+#include "SkDevice.h"
+
+namespace skiagm {
+
+extern GrContext* GetGr();
+
+static const int S = 200;
+
+class TexDataGM : public GM {
+public:
+ TexDataGM() {}
+
+protected:
+ virtual SkString onShortName() {
+ return SkString("texdata");
+ }
+
+ virtual SkISize onISize() {
+ return make_isize(2*S, 2*S);
+ }
+
+ void drawBG(SkCanvas* canvas) {
+ canvas->drawColor(0xff000000);
+ }
+
+ virtual void onDraw(SkCanvas* canvas) {
+ drawBG(canvas);
+ SkDevice* device = canvas->getDevice();
+ GrRenderTarget* target = (GrRenderTarget*) device->accessRenderTarget();
+ GrContext* ctx = GetGr();
+ if (ctx && target) {
+ SkPMColor gTextureData[(2 * S) * (2 * S)];
+ static const int stride = 2 * S;
+ static const SkPMColor gray = SkPackARGB32(0x40, 0x40, 0x40, 0x40);
+ static const SkPMColor white = SkPackARGB32(0xff, 0xff, 0xff, 0xff);
+ static const SkPMColor red = SkPackARGB32(0x80, 0x80, 0x00, 0x00);
+ static const SkPMColor blue = SkPackARGB32(0x80, 0x00, 0x00, 0x80);
+ static const SkPMColor green = SkPackARGB32(0x80, 0x00, 0x80, 0x00);
+ static const SkPMColor black = SkPackARGB32(0x00, 0x00, 0x00, 0x00);
+ for (int i = 0; i < 2; ++i) {
+ int offset = 0;
+ // fill upper-left
+ for (int y = 0; y < S; ++y) {
+ for (int x = 0; x < S; ++x) {
+ gTextureData[offset + y * stride + x] = gray;
+ }
+ }
+ // fill upper-right
+ offset = S;
+ for (int y = 0; y < S; ++y) {
+ for (int x = 0; x < S; ++x) {
+ gTextureData[offset + y * stride + x] = white;
+ }
+ }
+ // fill lower left
+ offset = S * stride;
+ for (int y = 0; y < S; ++y) {
+ for (int x = 0; x < S; ++x) {
+ gTextureData[offset + y * stride + x] = black;
+ }
+ }
+ // fill lower right
+ offset = S * stride + S;
+ for (int y = 0; y < S; ++y) {
+ for (int x = 0; x < S; ++x) {
+ gTextureData[offset + y * stride + x] = gray;
+ }
+ }
+
+ GrTextureDesc desc;
+ desc.fAALevel = kNone_GrAALevel;
+ // use RT flag bit because in GL it makes the texture be bottom-up
+ desc.fFlags = i ? kRenderTarget_GrTextureFlagBit :
+ kNone_GrTextureFlags;
+ desc.fFormat = kRGBA_8888_GrPixelConfig;
+ desc.fWidth = 2 * S;
+ desc.fHeight = 2 * S;
+ GrTexture* texture =
+ ctx->createUncachedTexture(desc, gTextureData, 0);
+
+ if (!texture) {
+ return;
+ }
+ GrAutoUnref au(texture);
+
+ ctx->setClip(GrRect::MakeWH(2*S, 2*S));
+ ctx->setRenderTarget(target);
+
+ GrPaint paint;
+ paint.reset();
+ paint.fColor = 0xffffffff;
+ paint.fSrcBlendCoeff = kOne_BlendCoeff;
+ paint.fDstBlendCoeff = kISA_BlendCoeff;
+ GrMatrix vm;
+ if (i) {
+ vm.setRotate(90, S , S);
+ } else {
+ vm.reset();
+ }
+ ctx->setMatrix(vm);
+ GrMatrix tm;
+ tm = vm;
+ tm.postIDiv(2*S, 2*S);
+ paint.getTextureSampler(0)->setMatrix(tm);
+ paint.setTexture(0, texture);
+
+ ctx->drawRect(paint, GrRect::MakeWH(2*S, 2*S));
+
+ // now update the lower right of the texture in first pass
+ // or upper right in second pass
+ offset = 0;
+ for (int y = 0; y < S; ++y) {
+ for (int x = 0; x < S; ++x) {
+ gTextureData[offset + y * stride + x] =
+ ((x + y) % 2) ? (i ? green : red) : blue;
+ }
+ }
+ // BUG: uploadTextureData doesn't force a flush
+ ctx->flush();
+ texture->uploadTextureData(S, i ? 0 : S, S, S, gTextureData, 4 * stride);
+ ctx->drawRect(paint, GrRect::MakeWH(2*S, 2*S));
+ }
+ }
+ }
+
+private:
+ typedef GM INHERITED;
+};
+
+//////////////////////////////////////////////////////////////////////////////
+
+static GM* MyFactory(void*) { return new TexDataGM; }
+static GMRegistry reg(MyFactory);
+
+}
+