Ensure that a surface is present before writing to it

TRAC #13595 This fixes a bug where glTexSubImage is called on a mipmapped texture before calling glTexImage. Signed-off-by: Daniel Koch git-svn-id: https://angleproject.googlecode.com/svn/trunk@434 736b8ea6-26fd-11df-bfd4-992fa37f6226

Ensure that a surface is present before writing to it
d3958d73 · daniel@transgaming.com · ecd7cf35 · d3958d73
Commit d3958d73 authored Sep 22, 2010 by daniel@transgaming.com
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Showing with 42 additions and 24 deletions

Texture.cpp src/libGLESv2/Texture.cpp +42 -24

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--- a/src/libGLESv2/Texture.cpp
+++ b/src/libGLESv2/Texture.cpp
@@ -777,18 +777,27 @@ bool Texture::subImage(GLint xoffset, GLint yoffset, GLsizei width, GLsizei heig
        return false;
    }
-    D3DLOCKED_RECT locked;
+    if (!img->surface)
-    HRESULT result = img->surface->LockRect(&locked, NULL, 0);
+    {
+        createSurface(img->width, img->height, format, type, img);
-    ASSERT(SUCCEEDED(result));
+    }
-    if (SUCCEEDED(result))
+    if (pixels != NULL && img->surface != NULL)
    {
-        loadImageData(xoffset, yoffset, width, height, format, type, unpackAlignment, pixels, locked.Pitch, locked.pBits);
+        D3DLOCKED_RECT locked;
-        img->surface->UnlockRect();
+        HRESULT result = img->surface->LockRect(&locked, NULL, 0);
+        ASSERT(SUCCEEDED(result));
+        if (SUCCEEDED(result))
+        {
+            loadImageData(xoffset, yoffset, width, height, format, type, unpackAlignment, pixels, locked.Pitch, locked.pBits);
+            img->surface->UnlockRect();
+        }
+        img->dirty = true;
    }
-    img->dirty = true;
    return true;
 }
@@ -806,29 +815,38 @@ bool Texture::subImageCompressed(GLint xoffset, GLint yoffset, GLsizei width, GL
        return false;
    }
-    RECT updateRegion;
+    if (!img->surface)
-    updateRegion.left = xoffset;
+    {
-    updateRegion.right = xoffset + width;
+        createSurface(img->width, img->height, format, GL_UNSIGNED_BYTE, img);
-    updateRegion.bottom = yoffset + height;
+    }
-    updateRegion.top = yoffset;
-    D3DLOCKED_RECT locked;
+    if (pixels != NULL && img->surface != NULL)
-    HRESULT result = img->surface->LockRect(&locked, &updateRegion, 0);
+    {
+        RECT updateRegion;
+        updateRegion.left = xoffset;
+        updateRegion.right = xoffset + width;
+        updateRegion.bottom = yoffset + height;
+        updateRegion.top = yoffset;
-    ASSERT(SUCCEEDED(result));
+        D3DLOCKED_RECT locked;
+        HRESULT result = img->surface->LockRect(&locked, &updateRegion, 0);
-    if (SUCCEEDED(result))
+        ASSERT(SUCCEEDED(result));
-    {
-        GLsizei inputPitch = ComputeCompressedPitch(width, format);
+        if (SUCCEEDED(result))
-        int rows = imageSize / inputPitch;
-        for (int i = 0; i < rows; ++i)
        {
-            memcpy((void*)((BYTE*)locked.pBits + i * locked.Pitch), (void*)((BYTE*)pixels + i * inputPitch), inputPitch);
+            GLsizei inputPitch = ComputeCompressedPitch(width, format);
+            int rows = imageSize / inputPitch;
+            for (int i = 0; i < rows; ++i)
+            {
+                memcpy((void*)((BYTE*)locked.pBits + i * locked.Pitch), (void*)((BYTE*)pixels + i * inputPitch), inputPitch);
+            }
+            img->surface->UnlockRect();
        }
-        img->surface->UnlockRect();
+        img->dirty = true;
    }
-    img->dirty = true;
    return true;
 }