Initial work

external/android-emugl/host/libs/GLESv2_dec/GLESv2Decoder.cpp

@@ -0,0 +1,129 @@
+/*
+* Copyright 2011 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.
+*/
+
+#include "GLESv2Decoder.h"
+
+#include <EGL/egl.h>
+#include <GLES2/gl2.h>
+#include <GLES2/gl2ext.h>
+
+static inline void* SafePointerFromUInt(GLuint value) {
+  return (void*)(uintptr_t)value;
+}
+
+GLESv2Decoder::GLESv2Decoder()
+{
+    m_contextData = NULL;
+    m_GL2library = NULL;
+}
+
+GLESv2Decoder::~GLESv2Decoder()
+{
+    delete m_GL2library;
+}
+
+void *GLESv2Decoder::s_getProc(const char *name, void *userData)
+{
+    GLESv2Decoder *ctx = (GLESv2Decoder *) userData;
+
+    if (ctx == NULL || ctx->m_GL2library == NULL) {
+        return NULL;
+    }
+
+    void *func = NULL;
+#ifdef USE_EGL_GETPROCADDRESS
+    func = (void *) eglGetProcAddress(name);
+#endif
+    if (func == NULL) {
+        func = (void *) ctx->m_GL2library->findSymbol(name);
+    }
+    return func;
+}
+
+int GLESv2Decoder::initGL(get_proc_func_t getProcFunc, void *getProcFuncData)
+{
+    this->initDispatchByName(getProcFunc, getProcFuncData);
+
+    glGetCompressedTextureFormats = s_glGetCompressedTextureFormats;
+    glVertexAttribPointerData = s_glVertexAttribPointerData;
+    glVertexAttribPointerOffset = s_glVertexAttribPointerOffset;
+
+    glDrawElementsOffset = s_glDrawElementsOffset;
+    glDrawElementsData = s_glDrawElementsData;
+    glShaderString = s_glShaderString;
+    glFinishRoundTrip = s_glFinishRoundTrip;
+    return 0;
+
+}
+
+int GLESv2Decoder::s_glFinishRoundTrip(void *self)
+{
+    GLESv2Decoder *ctx = (GLESv2Decoder *)self;
+    ctx->glFinish();
+    return 0;
+}
+
+void GLESv2Decoder::s_glGetCompressedTextureFormats(void *self, int count, GLint *formats)
+{
+    GLESv2Decoder *ctx = (GLESv2Decoder *) self;
+
+    int nFormats;
+    ctx->glGetIntegerv(GL_NUM_COMPRESSED_TEXTURE_FORMATS, &nFormats);
+    if (nFormats > count) {
+        fprintf(stderr, "%s: GetCompressedTextureFormats: The requested number of formats does not match the number that is reported by OpenGL\n", __FUNCTION__);
+    } else {
+        ctx->glGetIntegerv(GL_COMPRESSED_TEXTURE_FORMATS, formats);
+    }
+}
+
+void GLESv2Decoder::s_glVertexAttribPointerData(void *self, GLuint indx, GLint size, GLenum type,
+                                             GLboolean normalized, GLsizei stride,  void * data, GLuint datalen)
+{
+    GLESv2Decoder *ctx = (GLESv2Decoder *) self;
+    if (ctx->m_contextData != NULL) {
+        ctx->m_contextData->storePointerData(indx, data, datalen);
+        // note - the stride of the data is always zero when it comes out of the codec.
+        // See gl2.attrib for the packing function call.
+        ctx->glVertexAttribPointer(indx, size, type, normalized, 0, ctx->m_contextData->pointerData(indx));
+    }
+}
+
+void GLESv2Decoder::s_glVertexAttribPointerOffset(void *self, GLuint indx, GLint size, GLenum type,
+                                               GLboolean normalized, GLsizei stride,  GLuint data)
+{
+    GLESv2Decoder *ctx = (GLESv2Decoder *) self;
+    ctx->glVertexAttribPointer(indx, size, type, normalized, stride, SafePointerFromUInt(data));
+}
+
+
+void GLESv2Decoder::s_glDrawElementsData(void *self, GLenum mode, GLsizei count, GLenum type, void * data, GLuint datalen)
+{
+    GLESv2Decoder *ctx = (GLESv2Decoder *)self;
+    ctx->glDrawElements(mode, count, type, data);
+}
+
+
+void GLESv2Decoder::s_glDrawElementsOffset(void *self, GLenum mode, GLsizei count, GLenum type, GLuint offset)
+{
+    GLESv2Decoder *ctx = (GLESv2Decoder *)self;
+    ctx->glDrawElements(mode, count, type, SafePointerFromUInt(offset));
+}
+
+void GLESv2Decoder::s_glShaderString(void *self, GLuint shader, const GLchar* string, GLsizei len)
+{
+    GLESv2Decoder *ctx = (GLESv2Decoder *)self;
+    ctx->glShaderSource(shader, 1, &string, NULL);
+}