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-rw-r--r--dom/canvas/WebGLContextDraw.cpp21
1 files changed, 15 insertions, 6 deletions
diff --git a/dom/canvas/WebGLContextDraw.cpp b/dom/canvas/WebGLContextDraw.cpp
index 867e47cbd..fd9ee4957 100644
--- a/dom/canvas/WebGLContextDraw.cpp
+++ b/dom/canvas/WebGLContextDraw.cpp
@@ -216,7 +216,21 @@ WebGLContext::BindFakeBlack(uint32_t texUnit, TexTarget target, FakeBlackType fa
UniquePtr<FakeBlackTexture>& fakeBlackTex = *slot;
if (!fakeBlackTex) {
+ gl->fPixelStorei(LOCAL_GL_UNPACK_ALIGNMENT, 1);
+ if (IsWebGL2()) {
+ gl->fPixelStorei(LOCAL_GL_UNPACK_SKIP_PIXELS, 0);
+ gl->fPixelStorei(LOCAL_GL_UNPACK_SKIP_ROWS, 0);
+ gl->fPixelStorei(LOCAL_GL_UNPACK_SKIP_IMAGES, 0);
+ }
+
fakeBlackTex = FakeBlackTexture::Create(gl, target, fakeBlack);
+
+ gl->fPixelStorei(LOCAL_GL_UNPACK_ALIGNMENT, mPixelStore_UnpackAlignment);
+ if (IsWebGL2()) {
+ gl->fPixelStorei(LOCAL_GL_UNPACK_SKIP_PIXELS, mPixelStore_UnpackSkipPixels);
+ gl->fPixelStorei(LOCAL_GL_UNPACK_SKIP_ROWS, mPixelStore_UnpackSkipRows);
+ gl->fPixelStorei(LOCAL_GL_UNPACK_SKIP_IMAGES, mPixelStore_UnpackSkipImages);
+ }
if (!fakeBlackTex) {
return false;
}
@@ -1212,13 +1226,8 @@ WebGLContext::FakeBlackTexture::Create(gl::GLContext* gl, TexTarget target,
gl->fTexParameteri(target.get(), LOCAL_GL_TEXTURE_MIN_FILTER, LOCAL_GL_NEAREST);
gl->fTexParameteri(target.get(), LOCAL_GL_TEXTURE_MAG_FILTER, LOCAL_GL_NEAREST);
- // We allocate our zeros on the heap, and we overallocate (16 bytes instead of 4) to
- // minimize the risk of running into a driver bug in texImage2D, as it is a bit
- // unusual maybe to create 1x1 textures, and the stack may not have the alignment that
- // TexImage2D expects.
-
const webgl::DriverUnpackInfo dui = {texFormat, texFormat, LOCAL_GL_UNSIGNED_BYTE};
- UniqueBuffer zeros = moz_xcalloc(1, 16); // Infallible allocation.
+ UniqueBuffer zeros = moz_xcalloc(1, 4); // Infallible allocation.
MOZ_ASSERT(gl->IsCurrent());