Update the ReadPixels calls to return Error objects instead of calling gl::error.

BUG=angle:520

Change-Id: I2ead221e7d1f02cf088b60d0e98376fcd68dde8e
Reviewed-on: https://chromium-review.googlesource.com/211441
Reviewed-by: Shannon Woods <shannonwoods@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>

6 files changed, 58 insertions, 32 deletions

diff --git a/src/libGLESv2/renderer/d3d/d3d11/Buffer11.cpp b/src/libGLESv2/renderer/d3d/d3d11/Buffer11.cpp
index 08e9c338..3fee3fd5 100644
--- a/src/libGLESv2/renderer/d3d/d3d11/Buffer11.cpp
+++ b/src/libGLESv2/renderer/d3d/d3d11/Buffer11.cpp
@@ -140,7 +140,7 @@ class Buffer11::PackStorage11 : public Buffer11::BufferStorage11
     virtual void *map(size_t offset, size_t length, GLbitfield access);
     virtual void unmap();
 
-    void packPixels(ID3D11Texture2D *srcTexure, UINT srcSubresource, const PackPixelsParams &params);
+    gl::Error packPixels(ID3D11Texture2D *srcTexure, UINT srcSubresource, const PackPixelsParams &params);
 
   private:
 
@@ -491,7 +491,7 @@ ID3D11ShaderResourceView *Buffer11::getSRV(DXGI_FORMAT srvFormat)
     return bufferSRV;
 }
 
-void Buffer11::packPixels(ID3D11Texture2D *srcTexture, UINT srcSubresource, const PackPixelsParams &params)
+gl::Error Buffer11::packPixels(ID3D11Texture2D *srcTexture, UINT srcSubresource, const PackPixelsParams &params)
 {
     PackStorage11 *packStorage = getPackStorage();
 
@@ -499,9 +499,15 @@ void Buffer11::packPixels(ID3D11Texture2D *srcTexture, UINT srcSubresource, cons
 
     if (packStorage)
     {
-        packStorage->packPixels(srcTexture, srcSubresource, params);
+        gl::Error error = packStorage->packPixels(srcTexture, srcSubresource, params);
+        if (error.isError())
+        {
+            return error;
+        }
         packStorage->setDataRevision(latestStorage ? latestStorage->getDataRevision() + 1 : 1);
     }
+
+    return gl::Error(GL_NO_ERROR);
 }
 
 Buffer11::BufferStorage11 *Buffer11::getBufferStorage(BufferUsage requestedUsage)
@@ -927,7 +933,7 @@ void Buffer11::PackStorage11::unmap()
     // No-op
 }
 
-void Buffer11::PackStorage11::packPixels(ID3D11Texture2D *srcTexure, UINT srcSubresource, const PackPixelsParams &params)
+gl::Error Buffer11::PackStorage11::packPixels(ID3D11Texture2D *srcTexure, UINT srcSubresource, const PackPixelsParams &params)
 {
     flushQueuedPackCommand();
     mQueuedPackCommand = new PackPixelsParams(params);
@@ -969,7 +975,11 @@ void Buffer11::PackStorage11::packPixels(ID3D11Texture2D *srcTexure, UINT srcSub
         stagingDesc.MiscFlags = 0;
 
         hr = device->CreateTexture2D(&stagingDesc, NULL, &mStagingTexture);
-        ASSERT(SUCCEEDED(hr));
+        if (FAILED(hr))
+        {
+            ASSERT(hr == E_OUTOFMEMORY);
+            return gl::Error(GL_OUT_OF_MEMORY, "Failed to allocate internal staging texture.");
+        }
     }
 
     // ReadPixels from multisampled FBOs isn't supported in current GL
@@ -986,6 +996,8 @@ void Buffer11::PackStorage11::packPixels(ID3D11Texture2D *srcTexure, UINT srcSub
 
     // Asynchronous copy
     immediateContext->CopySubresourceRegion(mStagingTexture, 0, 0, 0, 0, srcTexure, srcSubresource, &srcBox);
+
+    return gl::Error(GL_NO_ERROR);
 }
 
 void Buffer11::PackStorage11::flushQueuedPackCommand()
diff --git a/src/libGLESv2/renderer/d3d/d3d11/Buffer11.h b/src/libGLESv2/renderer/d3d/d3d11/Buffer11.h
index 68126333..70449bb0 100644
--- a/src/libGLESv2/renderer/d3d/d3d11/Buffer11.h
+++ b/src/libGLESv2/renderer/d3d/d3d11/Buffer11.h
@@ -60,7 +60,7 @@ class Buffer11 : public BufferD3D
     ID3D11Buffer *getBuffer(BufferUsage usage);
     ID3D11ShaderResourceView *getSRV(DXGI_FORMAT srvFormat);
     bool isMapped() const { return mMappedStorage != NULL; }
-    void packPixels(ID3D11Texture2D *srcTexure, UINT srcSubresource, const PackPixelsParams &params);
+    gl::Error packPixels(ID3D11Texture2D *srcTexure, UINT srcSubresource, const PackPixelsParams &params);
 
     // BufferD3D implementation
     virtual size_t getSize() const { return mSize; }
diff --git a/src/libGLESv2/renderer/d3d/d3d11/Renderer11.cpp b/src/libGLESv2/renderer/d3d/d3d11/Renderer11.cpp
index 7c45105b..1a652fd5 100644
--- a/src/libGLESv2/renderer/d3d/d3d11/Renderer11.cpp
+++ b/src/libGLESv2/renderer/d3d/d3d11/Renderer11.cpp
@@ -2581,8 +2581,8 @@ bool Renderer11::blitRect(gl::Framebuffer *readTarget, const gl::Rectangle &read
     return true;
 }
 
-void Renderer11::readPixels(gl::Framebuffer *framebuffer, GLint x, GLint y, GLsizei width, GLsizei height, GLenum format,
-                            GLenum type, GLuint outputPitch, const gl::PixelPackState &pack, uint8_t *pixels)
+gl::Error Renderer11::readPixels(gl::Framebuffer *framebuffer, GLint x, GLint y, GLsizei width, GLsizei height, GLenum format,
+                                 GLenum type, GLuint outputPitch, const gl::PixelPackState &pack, uint8_t *pixels)
 {
     ID3D11Texture2D *colorBufferTexture = NULL;
     unsigned int subresourceIndex = 0;
@@ -2603,16 +2603,27 @@ void Renderer11::readPixels(gl::Framebuffer *framebuffer, GLint x, GLint y, GLsi
             rx::Buffer11 *packBufferStorage = Buffer11::makeBuffer11(packBuffer->getImplementation());
             PackPixelsParams packParams(area, format, type, outputPitch, pack, reinterpret_cast<ptrdiff_t>(pixels));
 
+            gl::Error error = packBufferStorage->packPixels(colorBufferTexture, subresourceIndex, packParams);
+            if (error.isError())
+            {
+                return error;
+            }
+
             packBuffer->getIndexRangeCache()->clear();
-            packBufferStorage->packPixels(colorBufferTexture, subresourceIndex, packParams);
         }
         else
         {
-            readTextureData(colorBufferTexture, subresourceIndex, area, format, type, outputPitch, pack, pixels);
+            gl::Error error = readTextureData(colorBufferTexture, subresourceIndex, area, format, type, outputPitch, pack, pixels);
+            if (error.isError())
+            {
+                return error;
+            }
         }
 
         SafeRelease(colorBufferTexture);
     }
+
+    return gl::Error(GL_NO_ERROR);
 }
 
 Image *Renderer11::createImage()
@@ -2668,8 +2679,8 @@ TextureImpl *Renderer11::createTexture(GLenum target)
     return NULL;
 }
 
-void Renderer11::readTextureData(ID3D11Texture2D *texture, unsigned int subResource, const gl::Rectangle &area, GLenum format,
-                                 GLenum type, GLuint outputPitch, const gl::PixelPackState &pack, uint8_t *pixels)
+gl::Error Renderer11::readTextureData(ID3D11Texture2D *texture, unsigned int subResource, const gl::Rectangle &area, GLenum format,
+                                      GLenum type, GLuint outputPitch, const gl::PixelPackState &pack, uint8_t *pixels)
 {
     ASSERT(area.width >= 0);
     ASSERT(area.height >= 0);
@@ -2694,7 +2705,7 @@ void Renderer11::readTextureData(ID3D11Texture2D *texture, unsigned int subResou
     if (safeArea.width == 0 || safeArea.height == 0)
     {
         // no work to do
-        return;
+        return gl::Error(GL_NO_ERROR);
     }
 
     D3D11_TEXTURE2D_DESC stagingDesc;
@@ -2714,8 +2725,7 @@ void Renderer11::readTextureData(ID3D11Texture2D *texture, unsigned int subResou
     HRESULT result = mDevice->CreateTexture2D(&stagingDesc, NULL, &stagingTex);
     if (FAILED(result))
     {
-        ERR("Failed to create staging texture for readPixels, HRESULT: 0x%X.", result);
-        return;
+        return gl::Error(GL_OUT_OF_MEMORY, "Failed to create internal staging texture for ReadPixels, HRESULT: 0x%X.", result);
     }
 
     ID3D11Texture2D* srcTex = NULL;
@@ -2737,9 +2747,8 @@ void Renderer11::readTextureData(ID3D11Texture2D *texture, unsigned int subResou
         result = mDevice->CreateTexture2D(&resolveDesc, NULL, &srcTex);
         if (FAILED(result))
         {
-            ERR("Failed to create resolve texture for readPixels, HRESULT: 0x%X.", result);
             SafeRelease(stagingTex);
-            return;
+            return gl::Error(GL_OUT_OF_MEMORY, "Failed to create internal resolve texture for ReadPixels, HRESULT: 0x%X.", result);
         }
 
         mDeviceContext->ResolveSubresource(srcTex, 0, texture, subResource, textureDesc.Format);
@@ -2767,6 +2776,8 @@ void Renderer11::readTextureData(ID3D11Texture2D *texture, unsigned int subResou
     packPixels(stagingTex, packParams, pixels);
 
     SafeRelease(stagingTex);
+
+    return gl::Error(GL_NO_ERROR);
 }
 
 void Renderer11::packPixels(ID3D11Texture2D *readTexture, const PackPixelsParams &params, uint8_t *pixelsOut)
diff --git a/src/libGLESv2/renderer/d3d/d3d11/Renderer11.h b/src/libGLESv2/renderer/d3d/d3d11/Renderer11.h
index a3d52a71..865de21a 100644
--- a/src/libGLESv2/renderer/d3d/d3d11/Renderer11.h
+++ b/src/libGLESv2/renderer/d3d/d3d11/Renderer11.h
@@ -131,8 +131,9 @@ class Renderer11 : public Renderer
 
     virtual bool blitRect(gl::Framebuffer *readTarget, const gl::Rectangle &readRect, gl::Framebuffer *drawTarget, const gl::Rectangle &drawRect,
                           const gl::Rectangle *scissor, bool blitRenderTarget, bool blitDepth, bool blitStencil, GLenum filter);
-    virtual void readPixels(gl::Framebuffer *framebuffer, GLint x, GLint y, GLsizei width, GLsizei height, GLenum format,
-                            GLenum type, GLuint outputPitch, const gl::PixelPackState &pack, uint8_t *pixels);
+
+    virtual gl::Error readPixels(gl::Framebuffer *framebuffer, GLint x, GLint y, GLsizei width, GLsizei height, GLenum format,
+                                 GLenum type, GLuint outputPitch, const gl::PixelPackState &pack, uint8_t *pixels);
 
     // RenderTarget creation
     virtual RenderTarget *createRenderTarget(SwapChain *swapChain, bool depth);
@@ -207,8 +208,8 @@ class Renderer11 : public Renderer
     void drawLineLoop(GLsizei count, GLenum type, const GLvoid *indices, int minIndex, gl::Buffer *elementArrayBuffer);
     void drawTriangleFan(GLsizei count, GLenum type, const GLvoid *indices, int minIndex, gl::Buffer *elementArrayBuffer, int instances);
 
-    void readTextureData(ID3D11Texture2D *texture, unsigned int subResource, const gl::Rectangle &area, GLenum format,
-                         GLenum type, GLuint outputPitch, const gl::PixelPackState &pack, uint8_t *pixels);
+    gl::Error readTextureData(ID3D11Texture2D *texture, unsigned int subResource, const gl::Rectangle &area, GLenum format,
+                              GLenum type, GLuint outputPitch, const gl::PixelPackState &pack, uint8_t *pixels);
 
     bool blitRenderbufferRect(const gl::Rectangle &readRect, const gl::Rectangle &drawRect, RenderTarget *readRenderTarget,
                               RenderTarget *drawRenderTarget, GLenum filter, const gl::Rectangle *scissor,
diff --git a/src/libGLESv2/renderer/d3d/d3d9/Renderer9.cpp b/src/libGLESv2/renderer/d3d/d3d9/Renderer9.cpp
index 5583dfe1..e3615f46 100644
--- a/src/libGLESv2/renderer/d3d/d3d9/Renderer9.cpp
+++ b/src/libGLESv2/renderer/d3d/d3d9/Renderer9.cpp
@@ -2559,8 +2559,8 @@ bool Renderer9::blitRect(gl::Framebuffer *readFramebuffer, const gl::Rectangle &
     return true;
 }
 
-void Renderer9::readPixels(gl::Framebuffer *framebuffer, GLint x, GLint y, GLsizei width, GLsizei height, GLenum format,
-                           GLenum type, GLuint outputPitch, const gl::PixelPackState &pack, uint8_t *pixels)
+gl::Error Renderer9::readPixels(gl::Framebuffer *framebuffer, GLint x, GLint y, GLsizei width, GLsizei height, GLenum format,
+                                GLenum type, GLuint outputPitch, const gl::PixelPackState &pack, uint8_t *pixels)
 {
     ASSERT(pack.pixelBuffer.get() == NULL);
 
@@ -2581,7 +2581,7 @@ void Renderer9::readPixels(gl::Framebuffer *framebuffer, GLint x, GLint y, GLsiz
     if (!surface)
     {
         // context must be lost
-        return;
+        return gl::Error(GL_NO_ERROR);
     }
 
     D3DSURFACE_DESC desc;
@@ -2591,7 +2591,7 @@ void Renderer9::readPixels(gl::Framebuffer *framebuffer, GLint x, GLint y, GLsiz
     {
         UNIMPLEMENTED();   // FIXME: Requires resolve using StretchRect into non-multisampled render target
         SafeRelease(surface);
-        return gl::error(GL_OUT_OF_MEMORY);
+        return gl::Error(GL_OUT_OF_MEMORY, "ReadPixels is unimplemented for multisampled framebuffer attachments.");
     }
 
     HRESULT result;
@@ -2619,7 +2619,7 @@ void Renderer9::readPixels(gl::Framebuffer *framebuffer, GLint x, GLint y, GLsiz
         {
             ASSERT(result == D3DERR_OUTOFVIDEOMEMORY || result == E_OUTOFMEMORY);
             SafeRelease(surface);
-            return gl::error(GL_OUT_OF_MEMORY);
+            return gl::Error(GL_OUT_OF_MEMORY, "Failed to allocate internal texture for ReadPixels.");
         }
     }
 
@@ -2635,20 +2635,19 @@ void Renderer9::readPixels(gl::Framebuffer *framebuffer, GLint x, GLint y, GLsiz
         if (d3d9::isDeviceLostError(result))
         {
             notifyDeviceLost();
-            return gl::error(GL_OUT_OF_MEMORY);
         }
         else
         {
             UNREACHABLE();
-            return;
         }
 
+        return gl::Error(GL_OUT_OF_MEMORY, "Failed to read internal render target data.");
     }
 
     if (directToPixels)
     {
         SafeRelease(systemSurface);
-        return;
+        return gl::Error(GL_NO_ERROR);
     }
 
     RECT rect;
@@ -2665,7 +2664,7 @@ void Renderer9::readPixels(gl::Framebuffer *framebuffer, GLint x, GLint y, GLsiz
         UNREACHABLE();
         SafeRelease(systemSurface);
 
-        return;   // No sensible error to generate
+        return gl::Error(GL_OUT_OF_MEMORY, "Failed to lock internal render target.");
     }
 
     uint8_t *source;
@@ -2734,6 +2733,8 @@ void Renderer9::readPixels(gl::Framebuffer *framebuffer, GLint x, GLint y, GLsiz
 
     systemSurface->UnlockRect();
     SafeRelease(systemSurface);
+
+    return gl::Error(GL_NO_ERROR);
 }
 
 RenderTarget *Renderer9::createRenderTarget(SwapChain *swapChain, bool depth)
diff --git a/src/libGLESv2/renderer/d3d/d3d9/Renderer9.h b/src/libGLESv2/renderer/d3d/d3d9/Renderer9.h
index e1398f2f..826a649d 100644
--- a/src/libGLESv2/renderer/d3d/d3d9/Renderer9.h
+++ b/src/libGLESv2/renderer/d3d/d3d9/Renderer9.h
@@ -134,8 +134,9 @@ class Renderer9 : public Renderer
 
     virtual bool blitRect(gl::Framebuffer *readTarget, const gl::Rectangle &readRect, gl::Framebuffer *drawTarget, const gl::Rectangle &drawRect,
                           const gl::Rectangle *scissor, bool blitRenderTarget, bool blitDepth, bool blitStencil, GLenum filter);
-    virtual void readPixels(gl::Framebuffer *framebuffer, GLint x, GLint y, GLsizei width, GLsizei height, GLenum format,
-                            GLenum type, GLuint outputPitch, const gl::PixelPackState &pack, uint8_t *pixels);
+
+    virtual gl::Error readPixels(gl::Framebuffer *framebuffer, GLint x, GLint y, GLsizei width, GLsizei height, GLenum format,
+                                 GLenum type, GLuint outputPitch, const gl::PixelPackState &pack, uint8_t *pixels);
 
     // RenderTarget creation
     virtual RenderTarget *createRenderTarget(SwapChain *swapChain, bool depth);