krzosa/imgui_transcript_browser
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Working on rendering

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This commit is contained in:
Krzosa Karol
2024-06-22 08:35:11 +02:00
parent a329bc2424
commit 94555d2a60
11 changed files with 258 additions and 150 deletions
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105
src/text_editor/main.cpp
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@@ -1,16 +1,23 @@
#define BASIC_IMPL
#include "../pdf_browser/basic.h"
#include "../basic/basic.h"
#include "raylib.h"
#include "raymath.h"
#include "buffer.cpp"
Arena FrameArena;
using Vec2 = Vector2;
struct Rect2 {
Vec2 min;
Vec2 max;
};
Vec2 GetSize(Rect2 r) {
Vec2 result = {r.max.x - r.min.x, r.max.y - r.min.y};
return result;
}
Rectangle ToRectangle(Rect2 r) {
Rectangle result = {r.min.x, r.min.y, r.max.x - r.min.x, r.max.y - r.min.y};
return result;
@@ -19,12 +26,21 @@ Rectangle ToRectangle(Rect2 r) {
// Render units - positions ready to draw, y
// World units - positions offset by screen movement
// Window units - positions inside the window (starts in left top of window)
// World window units
// WindowWorld units - positions offset by a position inside the buffer
struct Window {
Rect2 rect_in_world_units;
Vec2 window_world_to_window_units;
Array<Range> cursors;
Buffer buffer;
};
Vec2 WindowWorldToWindowUnits(Vec2 value, const Window &window) {
Vec2 result = Vector2Subtract(value, window.window_world_to_window_units);
return result;
}
Vec2 WorldToRenderUnits(Vec2 value, Vec2 camera_offset_world_to_render_units) {
Vec2 result = Vector2Subtract(value, camera_offset_world_to_render_units);
return result;
@@ -47,15 +63,22 @@ int main() {
InitScratch();
RunBufferTests();
return 0;
InitWindow(800, 600, "Hello");
SetTargetFPS(60);
InitArena(&FrameArena);
float font_size = 14;
float font_spacing = 1;
Font font = LoadFontEx("C:/Windows/Fonts/consola.ttf", (int)font_size, NULL, 250);
Array<char> buffer = {};
Buffer buffer = {};
InitBuffer(&buffer);
for (int i = 0; i < 100; i += 1) {
Array<Edit> edits = {FrameArena};
AddEdit(&edits, GetEnd(buffer), Format(FrameArena, "line number: %d\n", i));
ApplyEdits(&buffer, edits);
}
Array<Window> windows = {};
windows.add({GetScreenRectRenderUnits()});
@@ -64,38 +87,80 @@ int main() {
if (IsMouseButtonDown(MOUSE_BUTTON_LEFT) || IsKeyDown(KEY_SPACE)) {
camera_offset_world_to_render_units = Vector2Subtract(camera_offset_world_to_render_units, GetMouseDelta());
}
{
Window *focused_window = &windows[0];
float mouse_wheel = GetMouseWheelMove() * 48;
focused_window->window_world_to_window_units.y -= mouse_wheel;
}
for (int c = GetCharPressed(); c; c = GetCharPressed()) {
Assert(c >= ' ' && c <= '~');
buffer.add((char)c);
String string = "?";
UTF8Result utf8 = UTF32ToUTF8((uint32_t)c);
if (utf8.error == 0) {
string = {(char *)utf8.out_str, (int64_t)utf8.len};
}
Array<Edit> edits = {FrameArena};
AddEdit(&edits, {}, string);
ApplyEdits(&buffer, edits);
}
BeginDrawing();
ClearBackground(RAYWHITE);
For(windows) {
Rect2 rect_in_render_units = {
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),
};
Rectangle rectangle_in_render_units = ToRectangle(rect_in_render_units);
Rectangle rectangle_in_render_units = ToRectangle(window_rect_in_render_units);
DrawRectangleRec(rectangle_in_render_units, WHITE);
{
Vec2 text_position_in_window_units = {};
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);
DrawTextEx(font, "window 1", text_position_in_render_units, font_size, font_spacing, BLACK);
}
// @todo: add window bar?
// {
// Vec2 text_position_in_window_units = {};
// 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);
// DrawTextEx(font, "window 1", text_position_in_render_units, font_size, font_spacing, BLACK);
// }
//
// Line rendering
//
{
Vec2 text_position_in_window_units = {0, font_size};
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);
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);
buffer.add('\0');
DrawTextEx(font, buffer.data, text_position_in_render_units, font_size, font_spacing, BLACK);
buffer.pop();
Vec2 s = GetSize(window_rect_in_render_units_clamped_to_screen);
// buffer_pixel_size := GetRectSize(text_window_rect);
// _miny := w.scroll.y / Monosize.y;
// _maxy := (w.scroll.y + buffer_pixel_size.y) / Monosize.y;
// _minx := w.scroll.x / Monosize.x;
// _maxx := (w.scroll.x + buffer_pixel_size.x) / Monosize.x;
// miny := :int(floorf(_miny));
// minx := :int(floorf(_minx));
// 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);
}
}
}