wined3d: Use the source surface's texture for writing the backup.

The hwstretch blit code creates a new texture each time it is called to back up the back buffer and releases it afterwards. It is more efficient to keep the texture and release it with the surface.

wined3d: Use the source surface's texture for writing the backup.
424d34f8 · Stefan Dösinger · Alexandre Julliard · 6ac8d88d · 424d34f8
Commit 424d34f8 authored Mar 01, 2007 by Stefan Dösinger Committed by Alexandre Julliard Mar 01, 2007
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Showing with 27 additions and 19 deletions

surface.c dlls/wined3d/surface.c +27 -19

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--- a/dlls/wined3d/surface.c
+++ b/dlls/wined3d/surface.c
@@ -2251,7 +2251,7 @@ static inline void fb_copy_to_texture_direct(IWineD3DSurfaceImpl *This, IWineD3D

 /* Uses the hardware to stretch and flip the image */
 static inline void fb_copy_to_texture_hwstretch(IWineD3DSurfaceImpl *This, IWineD3DSurface *SrcSurface, IWineD3DSwapChainImpl *swapchain, WINED3DRECT *srect, WINED3DRECT *drect, BOOL upsidedown) {
-    GLuint backup, src;
+    GLuint src, backup = 0;
    IWineD3DDeviceImpl *myDevice = This->resource.wineD3DDevice;
    IWineD3DSurfaceImpl *Src = (IWineD3DSurfaceImpl *) SrcSurface;
    float left, right, top, bottom; /* Texture coordinates */
@@ -2263,22 +2263,27 @@ static inline void fb_copy_to_texture_hwstretch(IWineD3DSurfaceImpl *This, IWine
    ENTER_GL();
    ActivateContext(myDevice, SrcSurface, CTXUSAGE_BLIT);

-    /* Backup the back buffer and copy the source buffer into a texture to draw an upside down stretched quad. If
-     * we are reading from the back buffer, the backup can be used as source texture
-     */
-    glGenTextures(1, &backup);
-    checkGLcall("glGenTextures(1, &backup)");
-    glBindTexture(GL_TEXTURE_2D, backup);
-    checkGLcall("glBindTexture(GL_TEXTURE_2D, backup)");
+    if(!swapchain && wined3d_settings.offscreen_rendering_mode == ORM_FBO) {
+        glGenTextures(1, &backup);
+        checkGLcall("glGenTextures\n");
+        glBindTexture(GL_TEXTURE_2D, backup);
+        checkGLcall("glBindTexture(Src->glDescription.target, Src->glDescription.textureName)");
+    } else {
+        /* Backup the back buffer and copy the source buffer into a texture to draw an upside down stretched quad. If
+         * we are reading from the back buffer, the backup can be used as source texture
+         */
+        if(Src->glDescription.textureName == 0) {
+            /* Get it a description */
+            IWineD3DSurface_PreLoad(SrcSurface);
+        }
+        glBindTexture(GL_TEXTURE_2D, Src->glDescription.textureName);
+        checkGLcall("glBindTexture(Src->glDescription.target, Src->glDescription.textureName)");
+    }

    glReadBuffer(GL_BACK);
    checkGLcall("glReadBuffer(GL_BACK)");

    /* TODO: Only back up the part that will be overwritten */
-    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, Src->pow2Width, Src->pow2Height, 0,
-                 GL_RGBA, GL_UNSIGNED_BYTE, NULL);
-    checkGLcall("glTexImage2D");
-
    glCopyTexSubImage2D(GL_TEXTURE_2D, 0,
                        0, 0 /* read offsets */,
                        0, 0,
@@ -2287,13 +2292,14 @@ static inline void fb_copy_to_texture_hwstretch(IWineD3DSurfaceImpl *This, IWine

    checkGLcall("glCopyTexSubImage2D");

+    /* No issue with overriding these - the sampler is dirty due to blit usage */
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    checkGLcall("glTexParameteri");
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
    checkGLcall("glTexParameteri");

-    if(!swapchain || (IWineD3DSurface *) This == swapchain->backBuffer[0]) {
-        src = backup;
+    if(!swapchain || (IWineD3DSurface *) Src == swapchain->backBuffer[0]) {
+        src = backup ? backup : Src->glDescription.textureName;
    } else {
        glReadBuffer(GL_FRONT);
        checkGLcall("glReadBuffer(GL_FRONT)");
@@ -2370,8 +2376,8 @@ static inline void fb_copy_to_texture_hwstretch(IWineD3DSurfaceImpl *This, IWine
    checkGLcall("glCopyTexSubImage2D");

    /* Write the back buffer backup back */
-    glBindTexture(GL_TEXTURE_2D, backup);
-    checkGLcall("glBindTexture(GL_TEXTURE_2D, backup)");
+    glBindTexture(GL_TEXTURE_2D, backup ? backup : Src->glDescription.textureName);
+    checkGLcall("glBindTexture(GL_TEXTURE_2D, Src->glDescription.textureName)");

    glBegin(GL_QUADS);
        /* top left */
@@ -2392,12 +2398,14 @@ static inline void fb_copy_to_texture_hwstretch(IWineD3DSurfaceImpl *This, IWine
    glEnd();

    /* Cleanup */
-    if(src != backup) {
+    if(src != Src->glDescription.textureName && src != backup) {
        glDeleteTextures(1, &src);
        checkGLcall("glDeleteTextures(1, &src)");
    }
-    glDeleteTextures(1, &backup);
-    checkGLcall("glDeleteTextures(1, &backup)");
+    if(backup) {
+        glDeleteTextures(1, &backup);
+        checkGLcall("glDeleteTextures(1, &backup)");
+    }
    LEAVE_GL();
 }