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/*
* Copyright (C) 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 "rsdCore.h"
#include "rsdFrameBuffer.h"
#include "rsContext.h"
#include "rsFBOCache.h"
#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>
using namespace android;
using namespace android::renderscript;
struct DrvFrameBuffer {
GLuint mFBOId;
};
void checkError(const Context *rsc) {
GLenum status;
status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
switch (status) {
case GL_FRAMEBUFFER_COMPLETE:
break;
case GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT:
rsc->setError(RS_ERROR_BAD_VALUE,
"Unable to set up render Target: RFRAMEBUFFER_INCOMPLETE_ATTACHMENT");
break;
case GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT:
rsc->setError(RS_ERROR_BAD_VALUE,
"Unable to set up render Target: GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT");
break;
case GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS:
rsc->setError(RS_ERROR_BAD_VALUE,
"Unable to set up render Target: GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS");
break;
case GL_FRAMEBUFFER_UNSUPPORTED:
rsc->setError(RS_ERROR_BAD_VALUE,
"Unable to set up render Target: GL_FRAMEBUFFER_UNSUPPORTED");
break;
}
}
void setDepthAttachment(const Context *rsc, const FBOCache *fb) {
if (fb->mHal.state.depthTarget.get() != NULL) {
if (fb->mHal.state.depthTarget->getIsTexture()) {
uint32_t texID = fb->mHal.state.depthTarget->getTextureID();
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT,
GL_TEXTURE_2D, texID, 0);
} else {
uint32_t texID = fb->mHal.state.depthTarget->getRenderTargetID();
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT,
GL_RENDERBUFFER, texID);
}
} else {
// Reset last attachment
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT,
GL_RENDERBUFFER, 0);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT,
GL_TEXTURE_2D, 0, 0);
}
}
void setColorAttachment(const Context *rsc, const FBOCache *fb) {
// Now attach color targets
for (uint32_t i = 0; i < fb->mHal.state.colorTargetsCount; i ++) {
uint32_t texID = 0;
if (fb->mHal.state.colorTargets[i].get() != NULL) {
if (fb->mHal.state.colorTargets[i]->getIsTexture()) {
uint32_t texID = fb->mHal.state.colorTargets[i]->getTextureID();
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0 + i,
GL_TEXTURE_2D, texID, 0);
} else {
uint32_t texID = fb->mHal.state.depthTarget->getRenderTargetID();
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0 + i,
GL_RENDERBUFFER, texID);
}
} else {
// Reset last attachment
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0 + i,
GL_RENDERBUFFER, 0);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0 + i,
GL_TEXTURE_2D, 0, 0);
}
}
}
bool renderToFramebuffer(const FBOCache *fb) {
if (fb->mHal.state.depthTarget.get() != NULL) {
return false;
}
for (uint32_t i = 0; i < fb->mHal.state.colorTargetsCount; i ++) {
if (fb->mHal.state.colorTargets[i].get() != NULL) {
return false;
}
}
return true;
}
bool rsdFrameBufferInit(const Context *rsc, const FBOCache *fb) {
DrvFrameBuffer *drv = (DrvFrameBuffer *)calloc(1, sizeof(DrvFrameBuffer));
if (drv == NULL) {
return false;
}
fb->mHal.drv = drv;
drv->mFBOId = 0;
return true;
}
void rsdFrameBufferSetActive(const Context *rsc, const FBOCache *fb) {
DrvFrameBuffer *drv = (DrvFrameBuffer *)fb->mHal.drv;
bool framebuffer = renderToFramebuffer(fb);
if (!framebuffer) {
if(drv->mFBOId == 0) {
glGenFramebuffers(1, &drv->mFBOId);
}
glBindFramebuffer(GL_FRAMEBUFFER, drv->mFBOId);
setDepthAttachment(rsc, fb);
setColorAttachment(rsc, fb);
glViewport(0, 0, fb->mHal.state.colorTargets[0]->getType()->getDimX(),
fb->mHal.state.colorTargets[0]->getType()->getDimY());
checkError(rsc);
} else {
glBindFramebuffer(GL_FRAMEBUFFER, 0);
glViewport(0, 0, rsc->getWidth(), rsc->getHeight());
}
}
void rsdFrameBufferDestroy(const Context *rsc, const FBOCache *fb) {
DrvFrameBuffer *drv = (DrvFrameBuffer *)fb->mHal.drv;
if(drv->mFBOId != 0) {
glDeleteFramebuffers(1, &drv->mFBOId);
}
free(fb->mHal.drv);
fb->mHal.drv = NULL;
}
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