72 lines
2.0 KiB
C
72 lines
2.0 KiB
C
#include "twn_gpu_texture_c.h"
|
|
#include "twn_util_c.h"
|
|
|
|
|
|
GPUTexture create_gpu_texture(TextureFilter filter, bool generate_mipmaps) {
|
|
GLuint texture;
|
|
glGenTextures(1, &texture);
|
|
glBindTexture(GL_TEXTURE_2D, texture);
|
|
|
|
glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP, (GLboolean)generate_mipmaps);
|
|
|
|
if (filter == TEXTURE_FILTER_NEAREAST) {
|
|
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
|
|
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
|
|
} else if (filter == TEXTURE_FILTER_LINEAR) {
|
|
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
|
|
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
|
|
}
|
|
|
|
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
|
|
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
|
|
|
|
#if !defined(EMSCRIPTEN)
|
|
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
|
|
#endif
|
|
|
|
glBindTexture(GL_TEXTURE_2D, 0);
|
|
return texture;
|
|
}
|
|
|
|
|
|
void delete_gpu_texture(GPUTexture texture) {
|
|
glDeleteTextures(1, &texture);
|
|
}
|
|
|
|
|
|
void upload_gpu_texture(GPUTexture texture, void *pixels, int channels, int width, int height) {
|
|
glBindTexture(GL_TEXTURE_2D, texture);
|
|
|
|
int format_internal, format;
|
|
if (channels == 4) {
|
|
format_internal = GL_RGBA8;
|
|
format = GL_RGBA;
|
|
} else if (channels == 3) {
|
|
format_internal = GL_RGBA8;
|
|
format = GL_RGB;
|
|
} else if (channels == 1) {
|
|
format_internal = GL_ALPHA;
|
|
format = GL_ALPHA;
|
|
} else {
|
|
CRY("upload_gpu_texture", "Unsupported channel count");
|
|
return;
|
|
}
|
|
|
|
glTexImage2D(GL_TEXTURE_2D,
|
|
0,
|
|
format_internal,
|
|
width,
|
|
height,
|
|
0,
|
|
format,
|
|
GL_UNSIGNED_BYTE,
|
|
pixels);
|
|
|
|
glBindTexture(GL_TEXTURE_2D, 0);
|
|
}
|
|
|
|
|
|
void bind_gpu_texture(GPUTexture texture) {
|
|
glBindTexture(GL_TEXTURE_2D, texture);
|
|
}
|