本文整理汇总了C++中VisualGraphics::yPixelToCoord方法的典型用法代码示例。如果您正苦于以下问题：C++ VisualGraphics::yPixelToCoord方法的具体用法？C++ VisualGraphics::yPixelToCoord怎么用？C++ VisualGraphics::yPixelToCoord使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类VisualGraphics的用法示例。
在下文中一共展示了VisualGraphics::yPixelToCoord方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: createReadPixels
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;
}