Texture_t *texture_loadFromPng(const char *aPath, bool aRepeatHorizontal, bool aRepeatVertical)
{
Texture_t *out = obj_create_autoreleased(&Class_Texture);
out->displayCallback = (RenderableDisplayCallback_t)&_texture_draw;
Png_t *png = png_load(aPath);
if(!png) {
dynamo_log("Unable to load png file from %s", aPath);
return NULL;
}
glGenTextures(1, &out->id);
glBindTexture(GL_TEXTURE_2D, out->id);
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
glTexImage2D(GL_TEXTURE_2D, 0, png->hasAlpha ? GL_RGBA : GL_RGB, png->width, png->height,
0, png->hasAlpha ? GL_RGBA : GL_RGB, GL_UNSIGNED_BYTE, png->data);
glError()
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, aRepeatHorizontal ? GL_REPEAT : GL_CLAMP_TO_EDGE);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, aRepeatVertical ? GL_REPEAT : GL_CLAMP_TO_EDGE);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
// Mipmaps can only be generated if the texture size is a power of 2
if(_isPowerOfTwo(png->width) && _isPowerOfTwo(png->height) && !aRepeatHorizontal && !aRepeatVertical) {
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST);
glGenerateMipmap(GL_TEXTURE_2D);
} else {
dynamo_assert(!( (!_isPowerOfTwo(png->width) || !_isPowerOfTwo(png->height))
&& (aRepeatHorizontal || aRepeatVertical) ),
"Repeating textures must have power of 2 dimensions");
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
}
glError()
out->size = vec2_create(png->width, png->height);
out->pxAlignInset = vec2_create(
(1.0f/out->size.w) * 0.5,
(1.0f/out->size.h) * 0.5
);
return out;
}
PARCRingBuffer1x1 *
parcRingBuffer1x1_Create(uint32_t elements, RingBufferEntryDestroyer *destroyer)
{
assertTrue(_isPowerOfTwo(elements), "Parameter elements must be a power of 2, got %u", elements);
return _create(elements, destroyer);
}
