1 files changed, 88 insertions, 0 deletions
diff --git a/libs/hwui/renderstate/TextureState.h b/libs/hwui/renderstate/TextureState.h
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+++ b/libs/hwui/renderstate/TextureState.h
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+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef RENDERSTATE_TEXTURESTATE_H
+#define RENDERSTATE_TEXTURESTATE_H
+
+#include "Vertex.h"
+
+#include <GLES2/gl2.h>
+#include <GLES2/gl2ext.h>
+#include <SkXfermode.h>
+#include <memory>
+
+namespace android {
+namespace uirenderer {
+
+class TextureState {
+    friend class Caches; // TODO: move to RenderState
+public:
+    /**
+     * Activate the specified texture unit. The texture unit must
+     * be specified using an integer number (0 for GL_TEXTURE0 etc.)
+     */
+    void activateTexture(GLuint textureUnit);
+
+    /**
+     * Invalidate the cached value of the active texture unit.
+     */
+    void resetActiveTexture();
+
+    /**
+     * Binds the specified texture as a GL_TEXTURE_2D texture.
+     * All texture bindings must be performed with this method or
+     * bindTexture(GLenum, GLuint).
+     */
+    void bindTexture(GLuint texture);
+
+    /**
+     * Binds the specified texture with the specified render target.
+     * All texture bindings must be performed with this method or
+     * bindTexture(GLuint).
+     */
+    void bindTexture(GLenum target, GLuint texture);
+
+    /**
+     * Deletes the specified texture and clears it from the cache
+     * of bound textures.
+     * All textures must be deleted using this method.
+     */
+    void deleteTexture(GLuint texture);
+
+    /**
+     * Signals that the cache of bound textures should be cleared.
+     * Other users of the context may have altered which textures are bound.
+     */
+    void resetBoundTextures();
+
+    /**
+     * Clear the cache of bound textures.
+     */
+    void unbindTexture(GLuint texture);
+private:
+    // total number of texture units available for use
+    static const int kTextureUnitsCount = 3;
+
+    TextureState();
+    GLuint mTextureUnit;
+
+    // Caches texture bindings for the GL_TEXTURE_2D target
+    GLuint mBoundTextures[kTextureUnitsCount];
+};
+
+} /* namespace uirenderer */
+} /* namespace android */
+
+#endif // RENDERSTATE_BLEND_H