krzosa/text_editor
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Working on rendering lines and clipping

Browse Source
This commit is contained in:
Krzosa Karol
2024-06-22 10:02:12 +02:00
parent 94555d2a60
commit 64540d2d36
1 changed files with 57 additions and 30 deletions
Download Patch File Download Diff File Expand all files Collapse all files

87
src/text_editor/main.cpp
View File

@@ -59,6 +59,32 @@ Rect2 GetScreenRectRenderUnits() {
return result;
}
// Draw text using Font
// NOTE: chars spacing is NOT proportional to fontSize
void DrawTextNew(Font font, String text, Vector2 position, float fontSize, float spacing, Color tint) {
if (font.texture.id == 0) font = GetFontDefault(); // Security check in case of not valid font
float textOffsetX = 0.0f; // Offset X to next character to draw
float scaleFactor = fontSize / font.baseSize; // Character quad scaling factor
for (int i = 0; i < text.len;) {
// Get next codepoint from byte string and glyph index in font
int codepointByteCount = 0;
int codepoint = GetCodepointNext(&text.data[i], &codepointByteCount);
int index = GetGlyphIndex(font, codepoint);
if ((codepoint != ' ') && (codepoint != '\t')) {
DrawTextCodepoint(font, codepoint, {position.x + textOffsetX, position.y}, fontSize, tint);
}
if (font.glyphs[index].advanceX == 0) textOffsetX += ((float)font.recs[index].width * scaleFactor + spacing);
else textOffsetX += ((float)font.glyphs[index].advanceX * scaleFactor + spacing);
i += codepointByteCount; // Move text bytes counter to next codepoint
}
}
int main() {
InitScratch();
RunBufferTests();
@@ -91,6 +117,7 @@ int main() {
Window *focused_window = &windows[0];
float mouse_wheel = GetMouseWheelMove() * 48;
focused_window->window_world_to_window_units.y -= mouse_wheel;
focused_window->window_world_to_window_units.y = ClampBottom(focused_window->window_world_to_window_units.y, 0.f);
}
for (int c = GetCharPressed(); c; c = GetCharPressed()) {
@@ -108,10 +135,10 @@ int main() {
BeginDrawing();
ClearBackground(RAYWHITE);
For(windows) {
ForItem(window, windows) {
Rect2 window_rect_in_render_units = {
WorldToRenderUnits(it.rect_in_world_units.min, camera_offset_world_to_render_units),
WorldToRenderUnits(it.rect_in_world_units.max, camera_offset_world_to_render_units),
WorldToRenderUnits(window.rect_in_world_units.min, camera_offset_world_to_render_units),
WorldToRenderUnits(window.rect_in_world_units.max, camera_offset_world_to_render_units),
};
Rectangle rectangle_in_render_units = ToRectangle(window_rect_in_render_units);
DrawRectangleRec(rectangle_in_render_units, WHITE);
@@ -128,39 +155,39 @@ int main() {
// Line rendering
//
{
Rect2 screen_rect_in_render_units = GetScreenRectRenderUnits();
Rect2 window_rect_in_render_units_clamped_to_screen = window_rect_in_render_units;
window_rect_in_render_units_clamped_to_screen.min.x = Clamp(window_rect_in_render_units_clamped_to_screen.min.x, screen_rect_in_render_units.min.x, screen_rect_in_render_units.max.x);
window_rect_in_render_units_clamped_to_screen.max.x = Clamp(window_rect_in_render_units_clamped_to_screen.max.x, screen_rect_in_render_units.min.x, screen_rect_in_render_units.max.x);
window_rect_in_render_units_clamped_to_screen.min.y = Clamp(window_rect_in_render_units_clamped_to_screen.min.y, screen_rect_in_render_units.min.y, screen_rect_in_render_units.max.y);
window_rect_in_render_units_clamped_to_screen.max.y = Clamp(window_rect_in_render_units_clamped_to_screen.max.y, screen_rect_in_render_units.min.y, screen_rect_in_render_units.max.y);
// @todo: how do I implement the minimal drawing of text
// Rect2 screen_rect_in_render_units = GetScreenRectRenderUnits();
// Rect2 window_rect_in_render_units_clamped_to_screen = window_rect_in_render_units;
// window_rect_in_render_units_clamped_to_screen.min.x = Clamp(window_rect_in_render_units_clamped_to_screen.min.x, screen_rect_in_render_units.min.x, screen_rect_in_render_units.max.x);
// window_rect_in_render_units_clamped_to_screen.max.x = Clamp(window_rect_in_render_units_clamped_to_screen.max.x, screen_rect_in_render_units.min.x, screen_rect_in_render_units.max.x);
// window_rect_in_render_units_clamped_to_screen.min.y = Clamp(window_rect_in_render_units_clamped_to_screen.min.y, screen_rect_in_render_units.min.y, screen_rect_in_render_units.max.y);
// window_rect_in_render_units_clamped_to_screen.max.y = Clamp(window_rect_in_render_units_clamped_to_screen.max.y, screen_rect_in_render_units.min.y, screen_rect_in_render_units.max.y);
Vec2 s = GetSize(window_rect_in_render_units_clamped_to_screen);
// @todo: x
Vec2 s = GetSize(window_rect_in_render_units);
float line_offset = font_size;
float _line_min_y = (window.window_world_to_window_units.y) / line_offset;
float _line_max_y = (s.y + window.window_world_to_window_units.y) / line_offset;
int64_t line_min_y = (int64_t)floorf(_line_min_y);
int64_t line_max_y = (int64_t)ceilf(_line_max_y);
// buffer_pixel_size := GetRectSize(text_window_rect);
// _miny := w.scroll.y / Monosize.y;
// _maxy := (w.scroll.y + buffer_pixel_size.y) / Monosize.y;
Vec2 window_rect_in_render_units_size = GetSize(window_rect_in_render_units);
BeginScissorMode((int)window_rect_in_render_units.min.x, (int)window_rect_in_render_units.min.y, (int)window_rect_in_render_units_size.x, (int)window_rect_in_render_units_size.y);
for (int64_t line = line_min_y; line < line_max_y; line += 1) {
if (line < 0) break;
if (line >= buffer.lines.len) break;
// _minx := w.scroll.x / Monosize.x;
// _maxx := (w.scroll.x + buffer_pixel_size.x) / Monosize.x;
Range line_range = buffer.lines[line];
// miny := :int(floorf(_miny));
// minx := :int(floorf(_minx));
Vec2 text_position_in_world_window_units = {0, line_offset * (float)line};
Vec2 text_position_in_window_units = WindowWorldToWindowUnits(text_position_in_world_window_units, window);
Vec2 text_position_in_world_units = WindowToWorldUnits(text_position_in_window_units, window);
Vec2 text_position_in_render_units = WorldToRenderUnits(text_position_in_world_units, camera_offset_world_to_render_units);
// maxy := :int(ceilf(_maxy));
// maxx := :int(ceilf(_maxx));
float y = 0;
ForItem(line_range, buffer.lines) {
Vec2 text_position_in_world_window_units = {0, y};
y += font_size;
Vec2 text_position_in_window_units = WindowWorldToWindowUnits(text_position_in_world_window_units, it);
Vec2 text_position_in_world_units = WindowToWorldUnits(text_position_in_window_units, it);
Vec2 text_position_in_render_units = WorldToRenderUnits(text_position_in_world_units, camera_offset_world_to_render_units);
String string = CopyNullTerminated(FrameArena, buffer, line_range);
DrawTextEx(font, string.data, text_position_in_render_units, font_size, font_spacing, BLACK);
String string = GetString(buffer, line_range);
DrawTextNew(font, string, text_position_in_render_units, font_size, font_spacing, BLACK);
}
EndScissorMode();
}
}