diff options
Diffstat (limited to 'src/texture.cpp')
| -rw-r--r-- | src/texture.cpp | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/src/texture.cpp b/src/texture.cpp index 44e48a0..19aae3f 100644 --- a/src/texture.cpp +++ b/src/texture.cpp @@ -9,6 +9,7 @@ #include <config.hpp> #include <debug.hpp> #include <error.hpp> +#include <gif_lib.h> namespace Colors { @@ -149,6 +150,48 @@ void TextureIterator::operator()(const int &index) position->use(); } +void TextureIterator::appendGIF(const std::string& gif) +{ + int* error = nullptr; + auto handle = DGifOpenFileName(gif.c_str(), error); + UserAssert(handle != nullptr && error == nullptr, "Failed to load GIF: " + gif); + UserAssert(DGifSlurp(handle) == GIF_OK, "Failed to extract from GIF: " + gif); + + for (int i = 0; i < handle->ImageCount; i++) { + vec2 dim (handle->SavedImages[i].ImageDesc.Width, + handle->SavedImages[i].ImageDesc.Height); + int pcount = dim.x * dim.y; + auto buf = new GLubyte[pcount * 4]; + auto bits = handle->SavedImages[i].RasterBits; + auto map = handle->SColorMap->Colors; + for (int j = 0; j < pcount; j++) { + //if (bits[j * 4] == handle->SBackGroundColor) { + auto c = map[bits[j]]; + if (c.Red == 0xFF && c.Green == 0xFF && c.Blue == 0xFF) { + buf[j * 4] = buf[j * 4 + 1] = buf[j * 4 + 2] = buf[j * 4 + 3] = 0; + } else { + buf[j * 4 + 0] = c.Red; + buf[j * 4 + 1] = c.Green; + buf[j * 4 + 2] = c.Blue; + buf[j * 4 + 3] = 0xFF; + } + } + + GLuint object; + glGenTextures(1, &object); + glBindTexture(GL_TEXTURE_2D, object); + glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); + glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); + glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); + glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); + glPixelStorei(GL_UNPACK_ALIGNMENT, 1); + glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, dim.x, dim.y, 0, GL_RGBA, + GL_UNSIGNED_BYTE, buf); + + textures.emplace_back(gif, object, dim); + delete[] buf; + } +} void unloadTextures(void) { |