Reland 199454: "Move WrappedTexImage functionality to ui/gl"

Move WrappedTexImage functionality to ui/gl
    
BUG=235031

Review URL: https://chromiumcodereview.appspot.com/14983005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@199573 0039d316-1c4b-4281-b951-d872f2087c98

3 files changed, 192 insertions, 18 deletions

diff --git a/ui/gl/generate_bindings.py b/ui/gl/generate_bindings.py
index c19488c..968ec77 100755
--- a/ui/gl/generate_bindings.py
+++ b/ui/gl/generate_bindings.py
@@ -1218,22 +1218,6 @@ class GLContext;
   file.write('};\n')
   file.write('\n')
 
-  # Write Driver struct.
-  file.write(
-"""struct GL_EXPORT Driver%(name)s {
-  void InitializeBindings();
-  void InitializeExtensionBindings(GLContext* context);
-  void InitializeDebugBindings();
-  void ClearBindings();
-  void UpdateDebugExtensionBindings();
-
-  Procs%(name)s fn;
-  Procs%(name)s debug_fn;
-  Extensions%(name)s ext;
-""" % {'name': set_name.upper()})
-  file.write('};\n')
-  file.write('\n')
-
   # Write Api class.
   file.write(
 """class GL_EXPORT %(name)sApi {
diff --git a/ui/gl/gl_bindings.h b/ui/gl/gl_bindings.h
index e7bd808..38cadde 100644
--- a/ui/gl/gl_bindings.h
+++ b/ui/gl/gl_bindings.h
@@ -212,6 +212,77 @@ typedef uint64 EGLuint64CHROMIUM;
 
 namespace gfx {
 
+struct GL_EXPORT DriverGL {
+  void Initialize();
+  void InitializeExtensions(GLContext* context);
+  void InitializeDebugBindings();
+  void ClearBindings();
+  void UpdateDebugExtensionBindings();
+
+  ProcsGL fn;
+  ProcsGL orig_fn;
+  ProcsGL debug_fn;
+  ExtensionsGL ext;
+
+ private:
+  void InitializeBindings();
+  void InitializeExtensionBindings(GLContext* context);
+};
+
+struct GL_EXPORT DriverOSMESA {
+  void InitializeBindings();
+  void InitializeExtensionBindings(GLContext* context);
+  void InitializeDebugBindings();
+  void ClearBindings();
+  void UpdateDebugExtensionBindings();
+
+  ProcsOSMESA fn;
+  ProcsOSMESA debug_fn;
+  ExtensionsOSMESA ext;
+};
+
+#if defined(OS_WIN)
+struct GL_EXPORT DriverWGL {
+  void InitializeBindings();
+  void InitializeExtensionBindings(GLContext* context);
+  void InitializeDebugBindings();
+  void ClearBindings();
+  void UpdateDebugExtensionBindings();
+
+  ProcsWGL fn;
+  ProcsWGL debug_fn;
+  ExtensionsWGL ext;
+};
+#endif
+
+#if defined(OS_WIN) || defined(USE_X11) || defined(OS_ANDROID)
+struct GL_EXPORT DriverEGL {
+  void InitializeBindings();
+  void InitializeExtensionBindings(GLContext* context);
+  void InitializeDebugBindings();
+  void ClearBindings();
+  void UpdateDebugExtensionBindings();
+
+  ProcsEGL fn;
+  ProcsEGL debug_fn;
+  ExtensionsEGL ext;
+};
+#endif
+
+#if defined(USE_X11)
+struct GL_EXPORT DriverGLX {
+  void InitializeBindings();
+  void InitializeExtensionBindings(GLContext* context);
+  void InitializeDebugBindings();
+  void ClearBindings();
+  void UpdateDebugExtensionBindings();
+
+  ProcsGLX fn;
+  ProcsGLX debug_fn;
+  ExtensionsGLX ext;
+};
+#endif
+
 GL_EXPORT extern GLApi* g_current_gl_context;
 GL_EXPORT extern OSMESAApi* g_current_osmesa_context;
 GL_EXPORT extern DriverGL g_driver_gl;
diff --git a/ui/gl/gl_gl_api_implementation.cc b/ui/gl/gl_gl_api_implementation.cc
index 303ae1d..1002dbd 100644
--- a/ui/gl/gl_gl_api_implementation.cc
+++ b/ui/gl/gl_gl_api_implementation.cc
@@ -10,6 +10,7 @@
 #include "base/command_line.h"
 #include "base/string_util.h"
 #include "ui/gl/gl_context.h"
+#include "ui/gl/gl_implementation.h"
 #include "ui/gl/gl_state_restorer.h"
 #include "ui/gl/gl_surface.h"
 #include "ui/gl/gl_switches.h"
@@ -23,8 +24,126 @@ static RealGLApi* g_real_gl;
 // A GL Api that calls TRACE and then calls another GL api.
 static TraceGLApi* g_trace_gl;
 
+namespace {
+
+static inline GLenum GetTexInternalFormat(GLenum internal_format) {
+  if (gfx::GetGLImplementation() != gfx::kGLImplementationEGLGLES2) {
+    if (internal_format == GL_BGRA_EXT || internal_format == GL_BGRA8_EXT)
+      return GL_RGBA8;
+  }
+  return internal_format;
+}
+
+// TODO(epenner): Could the above function be merged into this and removed?
+static inline GLenum GetTexInternalFormat(GLenum internal_format,
+                                          GLenum format,
+                                          GLenum type) {
+  GLenum gl_internal_format = GetTexInternalFormat(internal_format);
+
+  if (gfx::GetGLImplementation() == gfx::kGLImplementationEGLGLES2)
+    return gl_internal_format;
+
+  if (type == GL_FLOAT) {
+    switch (format) {
+      case GL_RGBA:
+        gl_internal_format = GL_RGBA32F_ARB;
+        break;
+      case GL_RGB:
+        gl_internal_format = GL_RGB32F_ARB;
+        break;
+      case GL_LUMINANCE_ALPHA:
+        gl_internal_format = GL_LUMINANCE_ALPHA32F_ARB;
+        break;
+      case GL_LUMINANCE:
+        gl_internal_format = GL_LUMINANCE32F_ARB;
+        break;
+      case GL_ALPHA:
+        gl_internal_format = GL_ALPHA32F_ARB;
+        break;
+      default:
+        NOTREACHED();
+        break;
+    }
+  } else if (type == GL_HALF_FLOAT_OES) {
+    switch (format) {
+      case GL_RGBA:
+        gl_internal_format = GL_RGBA16F_ARB;
+        break;
+      case GL_RGB:
+        gl_internal_format = GL_RGB16F_ARB;
+        break;
+      case GL_LUMINANCE_ALPHA:
+        gl_internal_format = GL_LUMINANCE_ALPHA16F_ARB;
+        break;
+      case GL_LUMINANCE:
+        gl_internal_format = GL_LUMINANCE16F_ARB;
+        break;
+      case GL_ALPHA:
+        gl_internal_format = GL_ALPHA16F_ARB;
+        break;
+      default:
+        NOTREACHED();
+        break;
+    }
+  }
+  return gl_internal_format;
+}
+
+static inline GLenum GetTexType(GLenum type) {
+   if (gfx::GetGLImplementation() != gfx::kGLImplementationEGLGLES2) {
+     if (type == GL_HALF_FLOAT_OES)
+       return GL_HALF_FLOAT_ARB;
+   }
+   return type;
+}
+
+static void GL_BINDING_CALL CustomTexImage2D(
+    GLenum target, GLint level, GLint internalformat,
+    GLsizei width, GLsizei height, GLint border, GLenum format, GLenum type,
+    const void* pixels) {
+  GLenum gl_internal_format = GetTexInternalFormat(
+      internalformat, format, type);
+  GLenum gl_type = GetTexType(type);
+  return g_driver_gl.orig_fn.glTexImage2DFn(
+      target, level, gl_internal_format, width, height, border, format, gl_type,
+      pixels);
+}
+
+static void GL_BINDING_CALL CustomTexSubImage2D(
+      GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width,
+      GLsizei height, GLenum format, GLenum type, const void* pixels) {
+  GLenum gl_type = GetTexType(type);
+  return g_driver_gl.orig_fn.glTexSubImage2DFn(
+      target, level, xoffset, yoffset, width, height, format, gl_type, pixels);
+}
+
+static void GL_BINDING_CALL CustomTexStorage2DEXT(
+    GLenum target, GLsizei levels, GLenum internalformat, GLsizei width,
+    GLsizei height) {
+  GLenum gl_internal_format = GetTexInternalFormat(internalformat);
+  return g_driver_gl.orig_fn.glTexStorage2DEXTFn(
+      target, levels, gl_internal_format, width, height);
+}
+
+}  // anonymous namespace
+
+void DriverGL::Initialize() {
+  InitializeBindings();
+}
+
+void DriverGL::InitializeExtensions(GLContext* context) {
+  InitializeExtensionBindings(context);
+  orig_fn = fn;
+  fn.glTexImage2DFn =
+      reinterpret_cast<glTexImage2DProc>(CustomTexImage2D);
+  fn.glTexSubImage2DFn =
+      reinterpret_cast<glTexSubImage2DProc>(CustomTexSubImage2D);
+  fn.glTexStorage2DEXTFn =
+      reinterpret_cast<glTexStorage2DEXTProc>(CustomTexStorage2DEXT);
+}
+
 void InitializeGLBindingsGL() {
-  g_driver_gl.InitializeBindings();
+  g_driver_gl.Initialize();
   if (!g_real_gl) {
     g_real_gl = new RealGLApi();
     g_trace_gl = new TraceGLApi(g_real_gl);
@@ -51,7 +170,7 @@ void SetGLToRealGLApi() {
 }
 
 void InitializeGLExtensionBindingsGL(GLContext* context) {
-  g_driver_gl.InitializeExtensionBindings(context);
+  g_driver_gl.InitializeExtensions(context);
 }
 
 void InitializeDebugGLBindingsGL() {