MadeOfJelly/MushMachine
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flip sdl_surface in opengl texture loader

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This commit is contained in:
Green Sky 2021-04-18 02:44:36 +02:00
parent e3ae6c1521
commit 5d785b54d6
2 changed files with 25 additions and 4 deletions
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26
framework/opengl_primitives/src/mm/opengl/texture_loader.cpp
View File

@ -1,5 +1,7 @@
#include "./texture_loader.hpp"
#include <SDL.h>
#include <stb/stb_image.h>
#ifdef MM_OPENGL_3_GLES
@ -128,9 +130,29 @@ std::shared_ptr<Texture> TextureLoaderConstBuffer::load(const uint8_t* data, siz
return std::shared_ptr<Texture>(new Texture(handle, width, height, GL_RGBA8, GL_RGBA, GL_UNSIGNED_BYTE));
}
std::shared_ptr<Texture> TextureLoaderSDLSurface::load(SDL_Surface* surface) const {
std::shared_ptr<Texture> TextureLoaderSDLSurface::load(SDL_Surface* orig_surface) const {
uint32_t handle;
// setup temp
SDL_LockSurface(orig_surface);
SDL_Surface* surface = SDL_CreateRGBSurfaceWithFormat(0, orig_surface->w, orig_surface->h, orig_surface->pitch, orig_surface->format->format);
SDL_LockSurface(surface);
// flip
for (int line = orig_surface->h - 1; line >= 0; line--) {
memcpy(
static_cast<uint8_t*>(surface->pixels) + (line * surface->pitch),
static_cast<uint8_t*>(orig_surface->pixels) + (((orig_surface->h - 1) - line) * surface->pitch),
//orig_surface->w * orig_surface->format->BytesPerPixel
orig_surface->pitch
);
}
SDL_UnlockSurface(orig_surface); // does not get used beyond this point
// now load
glGenTextures(1, &handle);
glBindTexture(GL_TEXTURE_2D, handle);
@ -144,12 +166,12 @@ std::shared_ptr<Texture> TextureLoaderSDLSurface::load(SDL_Surface* surface) con
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
SDL_LockSurface(surface);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, surface->w, surface->h, 0, GL_RGBA, GL_UNSIGNED_BYTE, surface->pixels);
glBindTexture(GL_TEXTURE_2D, 0);
SDL_UnlockSurface(surface);
SDL_FreeSurface(surface);
return std::shared_ptr<Texture>(new Texture(handle, surface->w, surface->h, GL_RGBA8, GL_RGBA, GL_UNSIGNED_BYTE));
}

3
framework/opengl_primitives/src/mm/opengl/texture_loader.hpp
View File

@ -2,11 +2,10 @@
#include "./texture.hpp"
#include <SDL2/SDL.h>
#include <utility>
// fwd
typedef struct SDL_Surface SDL_Surface;
namespace MM {
class Engine;
}