libgui-sdl/source/gui/GuiTextureData.cpp
2020-10-02 19:57:53 +02:00

93 lines
2.4 KiB
C++

#include <SDL2/SDL_image.h>
#include <gui/GuiTextureData.h>
#include <gui/system/SDLSystem.h>
#include <gui/system/libgui_log.h>
GuiTextureData::GuiTextureData(const std::string& path) {
SDL_Surface *surface = IMG_Load_RW(SDL_RWFromFile(path.c_str(), "rb"), 1);
loadSurface(surface);
}
GuiTextureData::GuiTextureData(void *buffer, const uint32_t filesize, bool freesrc) {
SDL_RWops *rw = SDL_RWFromMem(buffer, filesize);
SDL_Surface *surface = IMG_Load_RW(rw, freesrc);
loadSurface(surface);
}
GuiTextureData::GuiTextureData(SDL_Texture *texture) {
if (this->texture) {
SDL_DestroyTexture(this->texture);
this->texture = nullptr;
}
this->texture = texture;
int w, h;
SDL_QueryTexture(this->texture, nullptr, nullptr, &w, &h);
this->width = w;
this->height = h;
}
void GuiTextureData::loadSurface(SDL_Surface *pSurface) {
if(!pSurface){
return;
}
cleanUp();
imgSurface = pSurface;
this->width = imgSurface->w;
this->height = imgSurface->h;
}
void GuiTextureData::cleanUp() {
if (imgSurface) {
SDL_FreeSurface(imgSurface);
imgSurface = nullptr;
}
if (texture) {
SDL_DestroyTexture(texture);
texture = nullptr;
}
}
/**
* Destructor for the GuiImage class.
*/
GuiTextureData::~GuiTextureData() {
cleanUp();
}
void GuiTextureData::draw(Renderer *renderer, const SDL_Rect& dest, float angle) {
if (texture == nullptr && imgSurface) {
texture = SDL_CreateTextureFromSurface(renderer->getRenderer(), imgSurface);
}
if (!texture) {
LG_Log("no texture!");
return;
}
// copy the texture to the rendering context
SDL_BlendMode mode;
SDL_GetRenderDrawBlendMode(renderer->getRenderer(), &mode);
// adjust blend mode
if(blendMode != mode){
SDL_SetRenderDrawBlendMode(renderer->getRenderer(), blendMode);
}
if (angle == 0) {
SDL_RenderCopy(renderer->getRenderer(), texture, nullptr, &dest);
} else {
SDL_RenderCopyEx(renderer->getRenderer(), texture, nullptr, &dest, angle, nullptr, SDL_FLIP_NONE);
}
if(blendMode != mode){
SDL_SetRenderDrawBlendMode(renderer->getRenderer(), mode);
}
}
int GuiTextureData::setBlendMode(SDL_BlendMode blendMode) {
this->blendMode = blendMode;
if(texture){ return SDL_SetTextureBlendMode(texture, blendMode); }
return SDL_BLENDMODE_INVALID;
}