1 files changed, 98 insertions, 0 deletions
diff --git a/jni/feature_mos/src/mosaic_renderer/FrameBuffer.cpp b/jni/feature_mos/src/mosaic_renderer/FrameBuffer.cpp
new file mode 100755
index 000000000..a956f23b7
--- /dev/null
+++ b/jni/feature_mos/src/mosaic_renderer/FrameBuffer.cpp
@@ -0,0 +1,98 @@
+#include "FrameBuffer.h"
+
+FrameBuffer::FrameBuffer()
+{
+    Reset();
+}
+
+FrameBuffer::~FrameBuffer() {
+}
+
+void FrameBuffer::Reset() {
+    mFrameBufferName = -1;
+    mTextureName = -1;
+    mWidth = 0;
+    mHeight = 0;
+    mFormat = -1;
+}
+
+bool FrameBuffer::InitializeGLContext() {
+    Reset();
+    return CreateBuffers();
+}
+
+bool FrameBuffer::Init(int width, int height, GLenum format) {
+    if (mFrameBufferName == (GLuint)-1) {
+        if (!CreateBuffers()) {
+            return false;
+        }
+    }
+    glBindFramebuffer(GL_FRAMEBUFFER, mFrameBufferName);
+    glBindTexture(GL_TEXTURE_2D, mTextureName);
+
+    glTexImage2D(GL_TEXTURE_2D,
+                 0,
+                 format,
+                 width,
+                 height,
+                 0,
+                 format,
+                 GL_UNSIGNED_BYTE,
+                 NULL);
+    if (!checkGlError("bind/teximage")) {
+        return false;
+    }
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+    // This is necessary to work with user-generated frame buffers with
+    // dimensions that are NOT powers of 2.
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+
+    // Attach texture to frame buffer.
+    glFramebufferTexture2D(GL_FRAMEBUFFER,
+                           GL_COLOR_ATTACHMENT0,
+                           GL_TEXTURE_2D,
+                           mTextureName,
+                           0);
+    checkFramebufferStatus("FrameBuffer.cpp");
+    checkGlError("framebuffertexture2d");
+
+    if (!checkGlError("texture setup")) {
+        return false;
+    }
+    mWidth = width;
+    mHeight = height;
+    mFormat = format;
+    glBindFramebuffer(GL_FRAMEBUFFER, 0);
+    return true;
+}
+
+bool FrameBuffer::CreateBuffers() {
+    glGenFramebuffers(1, &mFrameBufferName);
+    glGenTextures(1, &mTextureName);
+    if (!checkGlError("texture generation")) {
+        return false;
+    }
+    return true;
+}
+
+GLuint FrameBuffer::GetTextureName() const {
+    return mTextureName;
+}
+
+GLuint FrameBuffer::GetFrameBufferName() const {
+    return mFrameBufferName;
+}
+
+GLenum FrameBuffer::GetFormat() const {
+    return mFormat;
+}
+
+int FrameBuffer::GetWidth() const {
+    return mWidth;
+}
+
+int FrameBuffer::GetHeight() const {
+    return mHeight;
+}