bool Texture::Load()
{
if(!img.load(m_fileName.c_str())) {
printf("Texture path %s ERROR!\n", m_fileName.c_str());
return false;
}
QImage glimg = QGLWidget::convertToGLFormat(img);
DEBUG_GL();
glGenTextures(1, &m_textureObj);
DEBUG_GL();
glBindTexture(m_textureTarget, m_textureObj);
DEBUG_GL();
glTexImage2D(m_textureTarget, 0, GL_RGBA, glimg.size().width(), glimg.size().height(), 0, GL_RGBA, GL_UNSIGNED_BYTE, glimg.bits());
DEBUG_GL();
// `設定顯示貼圖被縮小時使用線性內插 `
glTexParameterf(m_textureTarget, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
// `設定顯示貼圖被放大時使用線性外插 `
glTexParameterf(m_textureTarget, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
// GL_TEXTURE_WRAP_S `設定水平方向解讀模式`
glTexParameteri(m_textureTarget, GL_TEXTURE_WRAP_S, GL_REPEAT);
// GL_TEXTURE_WRAP_T `設定垂直方向解讀模式`
glTexParameteri(m_textureTarget, GL_TEXTURE_WRAP_T, GL_REPEAT);
glBindTexture(m_textureTarget, 0);
DEBUG_GL();
return true;
}
void Texture::Bind(GLenum TextureUnit)
{
DEBUG_GL();
glActiveTexture(TextureUnit);
DEBUG_GL();
glBindTexture(m_textureTarget, m_textureObj);
DEBUG_GL();
}
/* XXX Error handling :-( */
static void init_busy_texture() {
unsigned int tex[4] =
{
0xffaa8888,
0xff554444,
0xff554444,
0xffaa8888
};
glGenTextures(1, &busy_texture);
printf("Busy texture @ num: %d\n", busy_texture);
glBindTexture(GL_TEXTURE_2D, busy_texture);
DEBUG_GL(glBindTexture);
/* Set the texture's stretching properties */
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
DEBUG_GL(glTexParameteri);
glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
DEBUG_GL(glTexParameteri);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
GL_NEAREST);
DEBUG_GL(glTexParameteri);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,
GL_NEAREST);
DEBUG_GL(glTexParameteri);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 2, 2,
0, GL_RGBA, GL_UNSIGNED_BYTE, tex);
DEBUG_GL(glTexImage2D);
}
static int pixmap_to_texture(void *pixmap, int width, int height, int format, int type)
{
unsigned int texname;
/* int max_texsize; */
int pow2_width, pow2_height;
/* Compute POT texture dimensions */
RPOW2(pow2_width, width);
RPOW2(pow2_height, height);
format = 42;
type = 31337;
glGenTextures(1, &texname);
printf("Generated texture: %d\n", texname);
DEBUG_GL(glGenTextures);
/* Bind the texture object */
glBindTexture(GL_TEXTURE_2D, texname);
DEBUG_GL(glBindTexture);
/* Set the texture's stretching properties */
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
GL_LINEAR);
DEBUG_GL(glTexParameteri);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,
GL_LINEAR);
DEBUG_GL(glTexParameteri);
/* Edit the texture object's image data using the information SDL_Surface gives us */
/*
glGetIntegerv(GL_MAX_TEXTURE_SIZE, &max_texsize);
printf("Max tex dimensions: %dx%d\n", max_texsize, max_texsize);
printf("width: %d, heigth %d\n", width, height);
*/
/* Special treatment is only needed if the GPU does not support NPOT
* textures and the current pixmap is not of POT dimensions.
*/
if (power_of_two && (pow2_width != width || pow2_height != height)) {
/*printf("pow2_width: %d, pow2_heigth %d\n", pow2_width, pow2_height); */
/* Allocate undefined POT texture */
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, pow2_width,
pow2_height, 0, GL_RGBA, GL_UNSIGNED_BYTE,
NULL);
DEBUG_GL(glTexImage2D);
/* Now fill texture */
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width, height,
GL_RGBA, GL_UNSIGNED_BYTE, pixmap);
DEBUG_GL(glTexSubImage2D);
} else {
/* NPOT, simply pass pixmap */
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width,
height, 0, GL_RGBA, GL_UNSIGNED_BYTE,
pixmap);
DEBUG_GL(glTexImage2D);
}
/* XXX: This function currently sets the global page size */
imw = width;
imh = height;
return texname;
}
