add opengl fronend, remove sdl frontend, refactor build system

1 files changed, 47 insertions, 0 deletions

diff --git a/frontends/calculator/CEdev/examples/gfx_blitting/src/main.c b/frontends/calculator/CEdev/examples/gfx_blitting/src/main.c
new file mode 100644
index 0000000..1582583
--- /dev/null
+++ b/frontends/calculator/CEdev/examples/gfx_blitting/src/main.c
@@ -0,0 +1,47 @@
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <tice.h>
+
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <graphx.h>
+
+/* This tutorial is meant to be played around with to get a feeling for how blitting works */
+void main(void) {
+    uint8_t c;
+
+    /* Initialize the 8bpp graphics, screen cleared to white */
+    gfx_Begin();
+
+    /* Draw to buffer instead of directly to screen */
+    gfx_SetDrawBuffer(); // This is the same as gfx_SetDraw(gfx_buffer)
+
+    /* Draw a gradient (to the buffer) */
+    for (c = 0; c < 8; c++) {
+        gfx_SetColor(c);
+        gfx_FillRectangle_NoClip(c * (LCD_WIDTH / 8), 0, LCD_WIDTH / 8, LCD_HEIGHT);
+    }
+
+    /* Wait for a key */
+    while (!os_GetCSC());
+
+    /* Copy parts of the buffer to the screen */
+    gfx_BlitLines(gfx_buffer, LCD_HEIGHT - 32, 32);
+    gfx_BlitRectangle(gfx_buffer, LCD_WIDTH / 4, LCD_HEIGHT / 4, LCD_WIDTH / 2, LCD_HEIGHT / 2);
+
+    /* Wait for a key */
+    while (!os_GetCSC());
+
+    /* Copy the full buffer to the screen */
+    gfx_BlitBuffer(); // This is the same as gfx_Blit(gfx_buffer)
+
+    /* Wait for a key */
+    while (!os_GetCSC());
+
+    /* Close the graphics */
+    gfx_End();
+}