commit 051d824df0eb26b1ef917447b68d6b5b9697b6e5
parent dd53ab4ae2656f38f16bfae604ff25a440770f0f
Author: rexim <reximkut@gmail.com>
Date: Fri, 2 Jul 2021 18:54:30 +0700
Make the cursor movable left and right
Diffstat:
| M | main.c | | | 48 | +++++++++++++++++++++++++++++++++++++++--------- |
1 file changed, 39 insertions(+), 9 deletions(-)
diff --git a/main.c b/main.c
@@ -78,6 +78,7 @@ Font font_load_from_file(SDL_Renderer *renderer, const char *file_path)
Font font = {0};
SDL_Surface *font_surface = surface_from_file(file_path);
+ scc(SDL_SetColorKey(font_surface, SDL_TRUE, 0xFF000000));
font.spritesheet = scp(SDL_CreateTextureFromSurface(renderer, font_surface));
SDL_FreeSurface(font_surface);
@@ -96,7 +97,7 @@ Font font_load_from_file(SDL_Renderer *renderer, const char *file_path)
return font;
}
-void render_char(SDL_Renderer *renderer, Font *font, char c, Vec2f pos, float scale)
+void render_char(SDL_Renderer *renderer, const Font *font, char c, Vec2f pos, float scale)
{
const SDL_Rect dst = {
.x = (int) floorf(pos.x),
@@ -111,15 +112,20 @@ void render_char(SDL_Renderer *renderer, Font *font, char c, Vec2f pos, float sc
scc(SDL_RenderCopy(renderer, font->spritesheet, &font->glyph_table[index], &dst));
}
-void render_text_sized(SDL_Renderer *renderer, Font *font, const char *text, size_t text_size, Vec2f pos, Uint32 color, float scale)
+void set_texture_color(SDL_Texture *texture, Uint32 color)
{
scc(SDL_SetTextureColorMod(
- font->spritesheet,
+ texture,
(color >> (8 * 0)) & 0xff,
(color >> (8 * 1)) & 0xff,
(color >> (8 * 2)) & 0xff));
- scc(SDL_SetTextureAlphaMod(font->spritesheet, (color >> (8 * 3)) & 0xff));
+ scc(SDL_SetTextureAlphaMod(texture, (color >> (8 * 3)) & 0xff));
+}
+
+void render_text_sized(SDL_Renderer *renderer, Font *font, const char *text, size_t text_size, Vec2f pos, Uint32 color, float scale)
+{
+ set_texture_color(font->spritesheet, color);
Vec2f pen = pos;
for (size_t i = 0; i < text_size; ++i) {
@@ -145,19 +151,31 @@ size_t buffer_size = 0;
((color) >> (8 * 2)) & 0xFF, \
((color) >> (8 * 3)) & 0xFF
-void render_cursor(SDL_Renderer *renderer, Uint32 color)
+void render_cursor(SDL_Renderer *renderer, const Font *font)
{
+ const Vec2f pos = vec2f(buffer_cursor * FONT_CHAR_WIDTH * FONT_SCALE, 0.0f);
+
const SDL_Rect rect = {
- .x = (int) floorf(buffer_cursor * FONT_CHAR_WIDTH * FONT_SCALE),
- .y = 0,
+ .x = (int) floorf(pos.x),
+ .y = (int) floorf(pos.y),
.w = FONT_CHAR_WIDTH * FONT_SCALE,
.h = FONT_CHAR_HEIGHT * FONT_SCALE,
};
- scc(SDL_SetRenderDrawColor(renderer, UNHEX(color)));
+ scc(SDL_SetRenderDrawColor(renderer, UNHEX(0xFFFFFFFF)));
scc(SDL_RenderFillRect(renderer, &rect));
+
+ set_texture_color(font->spritesheet, 0xFF000000);
+ if (buffer_cursor < buffer_size) {
+ render_char(renderer, font, buffer[buffer_cursor], pos, FONT_SCALE);
+ }
}
+// TODO: move the cursor around
+// TODO: Blinking cursor
+// TODO: Multiple lines
+// TODO: Save/Load file
+
int main(void)
{
scc(SDL_Init(SDL_INIT_VIDEO));
@@ -191,6 +209,18 @@ int main(void)
}
}
break;
+
+ case SDLK_LEFT: {
+ if (buffer_cursor > 0) {
+ buffer_cursor -= 1;
+ }
+ } break;
+
+ case SDLK_RIGHT: {
+ if (buffer_cursor < buffer_size) {
+ buffer_cursor += 1;
+ }
+ } break;
}
}
break;
@@ -213,7 +243,7 @@ int main(void)
scc(SDL_RenderClear(renderer));
render_text_sized(renderer, &font, buffer, buffer_size, vec2f(0.0, 0.0), 0xFFFFFFFF, FONT_SCALE);
- render_cursor(renderer, 0xFFFFFFFF);
+ render_cursor(renderer, &font);
SDL_RenderPresent(renderer);
}
