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| author | Thorbjørn Lindeijer <thorbjorn@lindeijer.nl> | 2012-07-22 21:24:31 +0200 |
|---|---|---|
| committer | Thorbjørn Lindeijer <thorbjorn@lindeijer.nl> | 2012-08-05 17:14:58 +0200 |
| commit | 1bc84de412775abcef84c1f604160121f245b131 (patch) | |
| tree | 9ffe1bdf5a9edeb23899e8e430bf7b28d0382c43 | |
| parent | 10c75a337be97c93b6de839402461fd400baf128 (diff) | |
| download | mana-client-1bc84de412775abcef84c1f604160121f245b131.tar.gz mana-client-1bc84de412775abcef84c1f604160121f245b131.tar.bz2 mana-client-1bc84de412775abcef84c1f604160121f245b131.tar.xz mana-client-1bc84de412775abcef84c1f604160121f245b131.zip | |
Added support for ARB_texture_non_power_of_two extension
If the graphics driver supports this, there is no need to create
textures with power-of-two dimensions. It is then also preferred to use
regular textures than relying on the older GL_ARB_texture_rectangle
extension.
Reviewed-by: Erik Schilling
| -rw-r--r-- | src/openglgraphics.cpp | 5 | ||||
| -rw-r--r-- | src/resources/image.cpp | 3 | ||||
| -rw-r--r-- | src/resources/image.h | 1 |
3 files changed, 7 insertions, 2 deletions
diff --git a/src/openglgraphics.cpp b/src/openglgraphics.cpp index 66d0d0fc..50fee075 100644 --- a/src/openglgraphics.cpp +++ b/src/openglgraphics.cpp @@ -113,14 +113,17 @@ bool OpenGLGraphics::setVideoMode(int w, int h, int bpp, bool fs, bool hwaccel) char const *glExtensions = (char const *)glGetString(GL_EXTENSIONS); GLint texSize; bool rectTex = strstr(glExtensions, "GL_ARB_texture_rectangle"); - if (rectTex) + bool npotTex = strstr(glExtensions, "GL_ARB_texture_non_power_of_two"); + if (rectTex && !npotTex) { Image::mTextureType = GL_TEXTURE_RECTANGLE_ARB; + Image::mPowerOfTwoTextures = false; glGetIntegerv(GL_MAX_RECTANGLE_TEXTURE_SIZE_ARB, &texSize); } else { Image::mTextureType = GL_TEXTURE_2D; + Image::mPowerOfTwoTextures = !npotTex; glGetIntegerv(GL_MAX_TEXTURE_SIZE, &texSize); } Image::mTextureSize = texSize; diff --git a/src/resources/image.cpp b/src/resources/image.cpp index 9a3e2ba2..3afa479f 100644 --- a/src/resources/image.cpp +++ b/src/resources/image.cpp @@ -36,6 +36,7 @@ #ifdef USE_OPENGL bool Image::mUseOpenGL = false; +bool Image::mPowerOfTwoTextures = true; int Image::mTextureType = 0; int Image::mTextureSize = 0; #endif @@ -544,7 +545,7 @@ void Image::setLoadAsOpenGL(bool useOpenGL) int Image::powerOfTwo(int input) { int value; - if (mTextureType == GL_TEXTURE_2D) + if (mPowerOfTwoTextures) { value = 1; while (value < input && value < mTextureSize) diff --git a/src/resources/image.h b/src/resources/image.h index 7df74c3f..33db7848 100644 --- a/src/resources/image.h +++ b/src/resources/image.h @@ -249,6 +249,7 @@ class Image : public Resource int mTexWidth, mTexHeight; static bool mUseOpenGL; + static bool mPowerOfTwoTextures; static int mTextureType; static int mTextureSize; #endif |