dingusppc/devices/video/display_sdl.cpp

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#include <devices/video/display.h>
#include <SDL.h>
#include <loguru.hpp>
class Display::Impl {
public:
bool resizing = false;
uint32_t disp_wnd_id = 0;
SDL_Window* display_wnd = 0;
SDL_Renderer* renderer = 0;
SDL_Texture* disp_texture = 0;
SDL_Texture* cursor_texture = 0;
SDL_Rect cursor_rect; // destination rectangle for cursor drawing
};
Display::Display(): impl(std::make_unique<Impl>())
{
}
Display::~Display()
{
if (impl->cursor_texture) {
SDL_DestroyTexture(impl->cursor_texture);
}
if (impl->disp_texture) {
SDL_DestroyTexture(impl->disp_texture);
}
if (impl->renderer) {
SDL_DestroyRenderer(impl->renderer);
}
if (impl->display_wnd) {
SDL_DestroyWindow(impl->display_wnd);
}
}
bool Display::configure(int width, int height)
{
bool is_initialization = false;
if (!impl->display_wnd) { // create display window
impl->display_wnd = SDL_CreateWindow(
"DingusPPC Display",
SDL_WINDOWPOS_UNDEFINED,
SDL_WINDOWPOS_UNDEFINED,
width, height,
SDL_WINDOW_OPENGL
);
impl->disp_wnd_id = SDL_GetWindowID(impl->display_wnd);
if (impl->display_wnd == NULL) {
ABORT_F("Display: SDL_CreateWindow failed with %s", SDL_GetError());
}
impl->renderer = SDL_CreateRenderer(impl->display_wnd, -1, SDL_RENDERER_ACCELERATED);
if (impl->renderer == NULL) {
ABORT_F("Display: SDL_CreateRenderer failed with %s", SDL_GetError());
}
is_initialization = true;
} else { // resize display window
SDL_SetWindowSize(impl->display_wnd, width, height);
impl->resizing = true;
}
if (impl->disp_texture) {
SDL_DestroyTexture(impl->disp_texture);
}
impl->disp_texture = SDL_CreateTexture(
impl->renderer,
SDL_PIXELFORMAT_ARGB8888,
SDL_TEXTUREACCESS_STREAMING,
width, height
);
if (impl->disp_texture == NULL) {
ABORT_F("Display: SDL_CreateTexture failed with %s", SDL_GetError());
}
return is_initialization;
}
void Display::handle_events(const WindowEvent& wnd_event)
{
if (wnd_event.sub_type == SDL_WINDOWEVENT_SIZE_CHANGED &&
wnd_event.window_id == impl->disp_wnd_id)
impl->resizing = false;
}
void Display::blank()
{
SDL_SetRenderDrawColor(impl->renderer, 0, 0, 0, 255);
SDL_RenderClear(impl->renderer);
SDL_RenderPresent(impl->renderer);
}
void Display::update(std::function<void(uint8_t *dst_buf, int dst_pitch)> convert_fb_cb, bool draw_hw_cursor, int cursor_x, int cursor_y)
{
if (impl->resizing)
return;
uint8_t* dst_buf;
int dst_pitch;
SDL_LockTexture(impl->disp_texture, NULL, (void **)&dst_buf, &dst_pitch);
// texture update callback to get ARGB data from guest framebuffer
convert_fb_cb(dst_buf, dst_pitch);
SDL_UnlockTexture(impl->disp_texture);
SDL_RenderClear(impl->renderer);
SDL_RenderCopy(impl->renderer, impl->disp_texture, NULL, NULL);
// draw HW cursor if enabled
if (draw_hw_cursor) {
impl->cursor_rect.x = cursor_x;
impl->cursor_rect.y = cursor_y;
SDL_RenderCopy(impl->renderer, impl->cursor_texture, NULL, &impl->cursor_rect);
}
SDL_RenderPresent(impl->renderer);
}
void Display::setup_hw_cursor(std::function<void(uint8_t *dst_buf, int dst_pitch)> draw_hw_cursor, int cursor_width, int cursor_height)
{
uint8_t* dst_buf;
int dst_pitch;
if (impl->cursor_texture) {
SDL_DestroyTexture(impl->cursor_texture);
}
impl->cursor_texture = SDL_CreateTexture(
impl->renderer,
SDL_PIXELFORMAT_ARGB8888,
SDL_TEXTUREACCESS_STREAMING,
cursor_width, cursor_height
);
if (impl->cursor_texture == NULL) {
ABORT_F("SDL_CreateTexture for HW cursor failed with %s", SDL_GetError());
}
SDL_LockTexture(impl->cursor_texture, NULL, (void **)&dst_buf, &dst_pitch);
SDL_SetTextureBlendMode(impl->cursor_texture, SDL_BLENDMODE_BLEND);
draw_hw_cursor(dst_buf, dst_pitch);
SDL_UnlockTexture(impl->cursor_texture);
impl->cursor_rect.x = 0;
impl->cursor_rect.y = 0;
impl->cursor_rect.w = cursor_width;
impl->cursor_rect.h = cursor_height;
}