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Unify GLES support in gui scaling filter

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This commit is contained in:
sfan5 2019-07-25 00:11:30 +02:00
parent ca363d3ef8
commit 6c2ded4cac
3 changed files with 45 additions and 39 deletions
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59
src/client/tile.cpp
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@ -995,12 +995,7 @@ video::IImage* TextureSource::generateImage(const std::string &name)
}
#if ENABLE_GLES
/**
* Check and align image to npot2 if required by hardware
* @param image image to check for npot2 alignment
* @param driver driver to use for image operations
* @return image or copy of image aligned to npot2
*/
static inline u16 get_GL_major_version()
{
@ -1008,47 +1003,55 @@ static inline u16 get_GL_major_version()
return (u16) (gl_version[0] - '0');
}
/**
* Check if hardware requires npot2 aligned textures
* @return true if alignment NOT(!) requires, false otherwise
*/
bool hasNPotSupport()
{
// Only GLES2 is trusted to correctly report npot support
// Note: we cache the boolean result, the GL context will never change.
static const bool supported = get_GL_major_version() > 1 &&
glGetString(GL_EXTENSIONS) &&
strstr((char *)glGetString(GL_EXTENSIONS), "GL_OES_texture_npot");
return supported;
}
/**
* Check and align image to npot2 if required by hardware
* @param image image to check for npot2 alignment
* @param driver driver to use for image operations
* @return image or copy of image aligned to npot2
*/
video::IImage * Align2Npot2(video::IImage * image,
video::IVideoDriver* driver)
{
if (image == NULL) {
if (image == NULL)
return image;
if (hasNPotSupport())
return image;
}
core::dimension2d<u32> dim = image->getDimension();
// Only GLES2 is trusted to correctly report npot support
// Note: we cache the boolean result. GL context will never change on Android.
static const bool hasNPotSupport = get_GL_major_version() > 1 &&
glGetString(GL_EXTENSIONS) &&
strstr((char *)glGetString(GL_EXTENSIONS), "GL_OES_texture_npot");
if (hasNPotSupport)
return image;
unsigned int height = npot2(dim.Height);
unsigned int width = npot2(dim.Width);
if ((dim.Height == height) &&
(dim.Width == width)) {
if (dim.Height == height && dim.Width == width)
return image;
}
if (dim.Height > height) {
if (dim.Height > height)
height *= 2;
}
if (dim.Width > width) {
if (dim.Width > width)
width *= 2;
}
video::IImage *targetimage =
driver->createImage(video::ECF_A8R8G8B8,
core::dimension2d<u32>(width, height));
if (targetimage != NULL) {
if (targetimage != NULL)
image->copyToScaling(targetimage);
}
image->drop();
return targetimage;
}