PixelColor* VisualTextureContainer::createReadPixels(const uint16 format, const uint16 type) {
PixelColor* pixels = NULL;
PixelColor* prevPixels = NULL;
char errStr[512];
double scaleFactor = 1.0;
uint8 numberOfBytesPerChannel = 0;
uint8 numberOfChannels = 0; // channel == color resp. alpha channel
uint8 numberOfBytesPerPixel = 0;
uint32 numberOfBytesPerRow = 0;
if ((format == kGL_RGBA) || (format == kGL_BGRA)) {
numberOfChannels = 4;
} else {
sprintf(errStr, "unknown format %d in file: %s (line: %d) [%s])", format, __FILE__, __LINE__, __FUNCTION__);
writeLog(errStr);
return pixels;
}
if ((type == kGL_UNSIGNED_INT_8_8_8_8_REV) || (type == kGL_UNSIGNED_INT_8_8_8_8) || (type == kGL_UNSIGNED_BYTE)) {
numberOfBytesPerChannel = 1; // // 1 byte (== 8 bits) per color/channel
} else {
sprintf(errStr, "unknown type %d in file: %s (line: %d) [%s])", type, __FILE__, __LINE__, __FUNCTION__);
writeLog(errStr);
return pixels;
}
numberOfBytesPerPixel = numberOfBytesPerChannel * numberOfChannels;
numberOfBytesPerRow = numberOfBytesPerPixel * this->textureRect.width;
VisualGraphics* theVisualGraphics = VisualGraphics::getInstance();
Coord coord;
VisualCamera aCamera;
aCamera.setOrthographicProjection();
coord.x = aCamera.getMaxLeftCoord() * scaleFactor;
coord.y = (aCamera.getMaxBottomCoord() + theVisualGraphics->yPixelToCoord(this->textureRect.height, aCamera)) * scaleFactor;
coord.z = aCamera.getMaxNearPos();
VertexChain aVertexChain;
TexCoord texCoord;
texCoord.s = 0.0;
texCoord.t = this->getTextureLogicalHeight();
VisualVertex* topLeftFrontVertex = new VisualVertex(coord, texCoord, white);
aVertexChain.push_back(topLeftFrontVertex);
coord.x = aCamera.getMaxLeftCoord() * scaleFactor;
coord.y = aCamera.getMaxBottomCoord() * scaleFactor;
coord.z = aCamera.getMaxNearPos();
texCoord.s = 0.0;
texCoord.t = 0.0;
VisualVertex* bottomLeftFrontVertex = new VisualVertex(coord, texCoord, white);
aVertexChain.push_back(bottomLeftFrontVertex);
coord.x = (aCamera.getMaxLeftCoord() + theVisualGraphics->xPixelToCoord(this->textureRect.width, aCamera)) * scaleFactor;
coord.y = aCamera.getMaxBottomCoord() * scaleFactor;
coord.z = aCamera.getMaxNearPos();
texCoord.s = this->getTextureLogicalWidth();
texCoord.t = 0.0;
VisualVertex* bottomRightFrontVertex = new VisualVertex(coord, texCoord, white);
aVertexChain.push_back(bottomRightFrontVertex);
coord.x = (aCamera.getMaxLeftCoord() + theVisualGraphics->xPixelToCoord(this->textureRect.width, aCamera)) * scaleFactor;
coord.y = (aCamera.getMaxBottomCoord() + theVisualGraphics->yPixelToCoord(this->textureRect.height, aCamera)) * scaleFactor;
coord.z = aCamera.getMaxNearPos();
texCoord.s = this->getTextureLogicalWidth();
texCoord.t = this->getTextureLogicalHeight();
VisualVertex* topRightFrontVertex = new VisualVertex(coord, texCoord, white);
aVertexChain.push_back(topRightFrontVertex);
// read previous pixels
if ((format == kGL_RGBA) || (format == kGL_BGRA)) {
prevPixels = (uint32*)calloc((numberOfBytesPerRow / numberOfBytesPerPixel) * this->textureRect.height, numberOfBytesPerPixel);
}
theVisualGraphics->readPixels(aCamera.getMaxLeftCoord(), aCamera.getMaxBottomCoord(), this->textureRect.width, this->textureRect.height, &prevPixels, format, type, aCamera);
// draw current texture
theVisualGraphics->drawTexture(this->textureName, &aVertexChain, this->getUseRectExtension(), kReplace);
// read pixels of current texture
if ((format == kGL_RGBA) || (format == kGL_BGRA)) {
pixels = (uint32*)calloc((numberOfBytesPerRow / numberOfBytesPerPixel) * this->textureRect.height, numberOfBytesPerPixel);
}
theVisualGraphics->readPixels(aCamera.getMaxLeftCoord(), aCamera.getMaxBottomCoord(), this->textureRect.width, this->textureRect.height, &pixels, format, type, aCamera);
// restore previous pixels
theVisualGraphics->drawPixels(&prevPixels, aCamera.getMaxLeftCoord(), aCamera.getMaxBottomCoord(), this->textureRect.width, this->textureRect.height, format, type);
for (VertexChainIterator chainIt = aVertexChain.begin(); chainIt != aVertexChain.end(); chainIt++) {
delete *chainIt;
*chainIt = NULL;
}
aVertexChain.clear();
free(prevPixels);
return pixels;
}
UInt32* VisualTextureContainer::getRectPixels(const UInt16 format, const UInt16 type) {
UInt32* pixels = NULL;
UInt32* prevPixels = NULL;
char errStr[512];
double scaleFactor = 1.0;
UInt8 numberOfBytesPerChannel = 0;
UInt8 numberOfChannels = 0; // channel == color resp. alpha channel
UInt8 numberOfBytesPerPixel = 0;
UInt32 numberOfBytesPerRow = 0;
if ((format == kGL_RGBA) || (format == kGL_BGRA)) {
numberOfChannels = 4;
} else {
sprintf(errStr, "unknown format %d in file: %s (line: %d) [%s])", format, __FILE__, __LINE__, __FUNCTION__);
writeLog(errStr);
return pixels;
}
if ((type == kGL_UNSIGNED_INT_8_8_8_8_REV) || (type == kGL_UNSIGNED_INT_8_8_8_8) || (type == kGL_UNSIGNED_BYTE)) {
numberOfBytesPerChannel = 1; // // 1 byte (== 8 bits) per color/channel
} else {
sprintf(errStr, "unknown type %d in file: %s (line: %d) [%s])", type, __FILE__, __LINE__, __FUNCTION__);
writeLog(errStr);
return pixels;
}
numberOfBytesPerPixel = numberOfBytesPerChannel * numberOfChannels;
numberOfBytesPerRow = numberOfBytesPerPixel * this->textureWidth;
VisualStageBox stageBox;
VisualStagePosition position;
position.horizontalAlignment = kLeftAligned;
position.verticalAlignment = kBottomAligned;
stageBox.setVisualStagePosition(position);
stageBox.setContentPixelWidth(this->getImageWidth());
stageBox.setContentPixelHeight(this->getImageHeight());
VertexChain aVertexChain;
Vertex* topLeftFrontVertex = new Vertex;
topLeftFrontVertex->vertexPosition.xPos = stageBox.getLeftCoord() * scaleFactor;
topLeftFrontVertex->vertexPosition.yPos = stageBox.getTopCoord() * scaleFactor;
topLeftFrontVertex->vertexPosition.zPos = stageBox.getFrontPosition();
topLeftFrontVertex->vertexColor.r = 1.0f;
topLeftFrontVertex->vertexColor.g = 1.0f;
topLeftFrontVertex->vertexColor.b = 1.0f;
topLeftFrontVertex->vertexColor.a = 1.0f;
topLeftFrontVertex->texCoordPosition.sPos = 0.0f;
topLeftFrontVertex->texCoordPosition.tPos = this->getTextureLogicalHeight();
aVertexChain.push_back(topLeftFrontVertex);
Vertex* bottomLeftFrontVertex = new Vertex;
bottomLeftFrontVertex->vertexPosition.xPos = stageBox.getLeftCoord() * scaleFactor;
bottomLeftFrontVertex->vertexPosition.yPos = stageBox.getBottomCoord() * scaleFactor;
bottomLeftFrontVertex->vertexPosition.zPos = stageBox.getFrontPosition();
bottomLeftFrontVertex->vertexColor.r = 1.0f;
bottomLeftFrontVertex->vertexColor.g = 1.0f;
bottomLeftFrontVertex->vertexColor.b = 1.0f;
bottomLeftFrontVertex->vertexColor.a = 1.0f;
bottomLeftFrontVertex->texCoordPosition.sPos = 0.0f;
bottomLeftFrontVertex->texCoordPosition.tPos = 0.0f;
aVertexChain.push_back(bottomLeftFrontVertex);
Vertex* bottomRightFrontVertex = new Vertex;
bottomRightFrontVertex->vertexPosition.xPos = stageBox.getRightCoord() * scaleFactor;
bottomRightFrontVertex->vertexPosition.yPos = stageBox.getBottomCoord() * scaleFactor;
bottomRightFrontVertex->vertexPosition.zPos = stageBox.getFrontPosition();
bottomRightFrontVertex->vertexColor.r = 1.0f;
bottomRightFrontVertex->vertexColor.g = 1.0f;
bottomRightFrontVertex->vertexColor.b = 1.0f;
bottomRightFrontVertex->vertexColor.a = 1.0f;
bottomRightFrontVertex->texCoordPosition.sPos = this->getTextureLogicalWidth();
bottomRightFrontVertex->texCoordPosition.tPos = 0.0f;
aVertexChain.push_back(bottomRightFrontVertex);
Vertex* topRightFrontVertex = new Vertex;
topRightFrontVertex->vertexPosition.xPos = stageBox.getRightCoord() * scaleFactor;
topRightFrontVertex->vertexPosition.yPos = stageBox.getTopCoord() * scaleFactor;
topRightFrontVertex->vertexPosition.zPos = stageBox.getFrontPosition();
topRightFrontVertex->vertexColor.r = 1.0f;
topRightFrontVertex->vertexColor.g = 1.0f;
topRightFrontVertex->vertexColor.b = 1.0f;
topRightFrontVertex->vertexColor.a = 1.0f;
topRightFrontVertex->texCoordPosition.sPos = this->getTextureLogicalWidth();
topRightFrontVertex->texCoordPosition.tPos = this->getTextureLogicalHeight();
aVertexChain.push_back(topRightFrontVertex);
VisualGraphics* theVisualGraphics = VisualGraphics::getInstance();
// read previous pixels
if ((format == kGL_RGBA) || (format == kGL_BGRA)) {
prevPixels = (UInt32*)calloc((numberOfBytesPerRow / numberOfBytesPerPixel) * this->textureHeight, numberOfBytesPerPixel);
}
theVisualGraphics->readPixels(stageBox.getLeftCoord(), stageBox.getBottomCoord(), this->textureWidth, this->textureHeight, &prevPixels, format, type);
// draw current texture
theVisualGraphics->drawTexture(this->textureName, &aVertexChain, this->getUseRectExtension(), kReplace);
// read pixels of current texture
if ((format == kGL_RGBA) || (format == kGL_BGRA)) {
pixels = (UInt32*)calloc((numberOfBytesPerRow / numberOfBytesPerPixel) * this->textureHeight, numberOfBytesPerPixel);
}
theVisualGraphics->readPixels(stageBox.getLeftCoord(), stageBox.getBottomCoord(), this->textureWidth, this->textureHeight, &pixels, format, type);
// restore previous pixels
theVisualGraphics->drawPixels(&prevPixels, stageBox.getLeftCoord(), stageBox.getBottomCoord(), this->textureWidth, this->textureHeight, format, type);
for (VertexChainIterator chainIt = aVertexChain.begin(); chainIt != aVertexChain.end(); chainIt++) {
delete *chainIt;
*chainIt = NULL;
}
aVertexChain.clear();
free(prevPixels);
return pixels;
}
