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#include "Texture.h"
Texture::Texture()
{
}
const QString&
Texture::getSourceURL(void) const
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{
return sourceURL;
}
void
Texture::setID(GLuint id)
{
this->id = id;
}
void
Texture::sync(const WebImagePtr& image)
{
state = static_cast<State>(image->getState());
if (image->getState() != WebImage::UNINITIALIZED &&
sourceURL != image->getSourceURL())
{
sourceURL = image->getSourceURL();
}
if (image->getState() == WebImage::READY && image->getSyncFlag())
{
image->setSyncFlag(false);
if (image->getWidth() != imageWidth ||
image->getHeight() != imageHeight)
{
imageWidth = image->getWidth();
textureWidth = 32;
while (textureWidth < imageWidth)
{
textureWidth *= 2;
}
imageHeight = image->getHeight();
textureHeight = 32;
while (textureHeight < imageHeight)
{
textureHeight *= 2;
}
maxU = static_cast<double>(imageWidth)
/ static_cast<double>(textureWidth);
maxV = static_cast<double>(imageHeight)
/ static_cast<double>(textureHeight);
glBindTexture(GL_TEXTURE_2D, id);
glTexImage2D(GL_TEXTURE_2D, 0, 3, textureWidth, textureHeight,
0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
}
glBindTexture(GL_TEXTURE_2D, id);
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, imageWidth, imageHeight,
GL_RGBA, GL_UNSIGNED_BYTE, image->getData());
void
Texture::draw(float x1, float y1, float x2, float y2,
bool smoothInterpolation) const
{
if (state == REQUESTED)
{
glBegin(GL_LINE_LOOP);
glColor3f(0.0f, 0.0f, 1.0f);
glVertex2f(x1, y1);
glVertex2f(x2, y1);
glVertex2f(x2, y2);
glVertex2f(x1, y2);
glEnd();
return;
}
glEnable(GL_TEXTURE_2D);
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float dx, dy;
if (smoothInterpolation)
{
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
dx = 1.0f / (2.0f * textureWidth);
dy = 1.0f / (2.0f * textureHeight);
}
else
{
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
dx = 0.0f;
dy = 0.0f;
}
glColor3f(1.0f, 1.0f, 1.0f);
glBegin(GL_QUADS);
glTexCoord2f(dx, maxV - dy);
glVertex2f(x1, y1);
glTexCoord2f(maxU - dx, maxV - dy);
glVertex2f(x2, y1);
glTexCoord2f(maxU - dx, dy);
glVertex2f(x2, y2);
glTexCoord2f(dx, dy);
glVertex2f(x1, y2);
glEnd();
glDisable(GL_TEXTURE_2D);
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void
Texture::draw(float x1, float y1, float x2, float y2,
float x3, float y3, float x4, float y4,
bool smoothInterpolation) const
{
if (state == REQUESTED)
{
glBegin(GL_LINE_LOOP);
glColor3f(0.0f, 0.0f, 1.0f);
glVertex2f(x1, y1);
glVertex2f(x2, y2);
glVertex2f(x3, y3);
glVertex2f(x4, y4);
glEnd();
return;
}
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, id);
float dx, dy;
if (smoothInterpolation)
{
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
dx = 1.0f / (2.0f * textureWidth);
dy = 1.0f / (2.0f * textureHeight);
}
else
{
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
dx = 0.0f;
dy = 0.0f;
}
glColor3f(1.0f, 1.0f, 1.0f);
glBegin(GL_QUADS);
glTexCoord2f(dx, maxV - dy);
glVertex2f(x1, y1);
glTexCoord2f(maxU - dx, maxV - dy);
glVertex2f(x2, y2);
glTexCoord2f(maxU - dx, dy);
glVertex2f(x3, y3);
glTexCoord2f(dx, dy);
glVertex2f(x4, y4);
glEnd();
glDisable(GL_TEXTURE_2D);
}