From 4cb21b503585764ae8f5208fee6f7ffd103d70f4 Mon Sep 17 00:00:00 2001
From: Uros Majstorovic <majstor@majstor.org>
Date: Tue, 12 Sep 2017 18:29:14 +0200
Subject: video test passed

---
 code/test/vid/display.c | 68 +++++++++++++++++++++++++++++++++++++++++++++++++
 code/test/vid/display.h | 17 +++++++++++++
 2 files changed, 85 insertions(+)
 create mode 100644 code/test/vid/display.c
 create mode 100644 code/test/vid/display.h

(limited to 'code')

diff --git a/code/test/vid/display.c b/code/test/vid/display.c
new file mode 100644
index 0000000..d378431
--- /dev/null
+++ b/code/test/vid/display.c
@@ -0,0 +1,68 @@
+#include <stdio.h>
+
+#include "display.h"
+
+void sdl_open(SDLCanvas *o, int img_width, int img_height) {
+    // Initialize the SDL
+    if (SDL_Init(SDL_INIT_VIDEO) != 0) {
+        fprintf(stderr, "SDL_Init() Failed: %s\n", SDL_GetError());
+        exit(1);
+    }
+
+    o->display = SDL_CreateWindow("SDL Tutorial",
+                              SDL_WINDOWPOS_UNDEFINED,
+                              SDL_WINDOWPOS_UNDEFINED,
+                              img_width, img_height, 0);
+    if (o->display == NULL) {
+        fprintf(stderr, "SDL_SetVideoMode() Failed: %s\n", SDL_GetError());
+        exit(1);
+    }
+
+    o->renderer = SDL_CreateRenderer(o->display, -1, 0);
+    if (o->renderer == NULL) {
+        fprintf(stderr, "SDL_CreateRenderer() Failed: %s\n", SDL_GetError());
+        exit(1);
+    }
+    
+    o->texture = SDL_CreateTexture(o->renderer, SDL_PIXELFORMAT_YV12, SDL_TEXTUREACCESS_STREAMING, img_width, img_height);
+    if (o->texture == NULL) {
+        fprintf(stderr, "SDL_CreateTextureFromSurface() Failed: %s\n", SDL_GetError());
+        exit(1);
+    }
+
+    o->yPlaneSz = img_width * img_height;
+    o->uvPlaneSz = img_width * img_height / 4;
+    o->yuvBuffer = (Uint8*)malloc(o->yPlaneSz + 2 * o->uvPlaneSz);
+    o->yPitch = img_width;
+    o->uvPitch = img_width / 2;
+}
+
+void sdl_close(SDLCanvas *o) {
+    free(o->yuvBuffer);
+    SDL_DestroyTexture(o->texture);
+    SDL_DestroyRenderer(o->renderer);
+    SDL_DestroyWindow(o->display);
+    SDL_Quit();
+}
+
+void sdl_display_frame(SDLCanvas *o) {
+    SDL_UpdateYUVTexture(o->texture, NULL, o->yuvBuffer, o->yPitch, o->yuvBuffer + o->yPlaneSz, o->uvPitch,  o->yuvBuffer + o->yPlaneSz + o->uvPlaneSz, o->uvPitch);
+    SDL_RenderClear(o->renderer);
+    SDL_RenderCopy(o->renderer, o->texture, NULL, NULL);
+    SDL_RenderPresent(o->renderer);
+}
+
+void sdl_loop(void) {
+    SDL_Event event;
+    
+    while(1) {
+        // Check for messages
+        if (SDL_PollEvent(&event)) {
+            // Check for the quit message
+            if (event.type == SDL_QUIT) {
+                // Quit the program
+                break;
+            }
+        }
+    }
+}
diff --git a/code/test/vid/display.h b/code/test/vid/display.h
new file mode 100644
index 0000000..38e07be
--- /dev/null
+++ b/code/test/vid/display.h
@@ -0,0 +1,17 @@
+#include "SDL.h"
+
+typedef struct SDLCanvas {
+    SDL_Window *display;
+    SDL_Renderer *renderer;
+    SDL_Texture *texture;
+    Uint8 *yuvBuffer;
+    size_t yPlaneSz;
+    size_t uvPlaneSz;
+    int yPitch;
+    int uvPitch;
+} SDLCanvas;
+
+void sdl_open(SDLCanvas *o, int img_width, int img_height);
+void sdl_close(SDLCanvas *o);
+void sdl_display_frame(SDLCanvas *o);
+void sdl_loop(void);
-- 
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