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feat: add stroke thickness

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This commit is contained in:
Froxwin
2026-03-05 00:51:20 +05:30
parent 8ac783e6e0
commit eefd95e4d2
15 changed files with 379 additions and 356 deletions
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51
src/application/applicationstate.c
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@@ -1,4 +1,5 @@
#include "./applicationstate.h"
#include "glib.h"
#include "src/core/primitives.h"
#include "src/core/raster.h"
#include "src/ui/vektorcanvas.h"
@@ -16,8 +17,25 @@ static void appstate_set_tool(GtkButton* button, gpointer user_data) {
data->state->selectedPrimitive = NULL;
}
static void canvas_onclick(GtkGestureClick* gesture, int n_press, double x, double y, gpointer user_data) {
vektor_appstate_canvas_click(user_data, x, y);
static void canvas_onclick(GtkGestureClick *gesture, int n_press, double x,
double y, gpointer user_data) {
VektorAppState *state = user_data;
GtkWidget *widget =
gtk_event_controller_get_widget(GTK_EVENT_CONTROLLER(gesture));
int widget_w = gtk_widget_get_width(widget);
int widget_h = gtk_widget_get_height(widget);
int canvas_w = state->canvas->width;
int canvas_h = state->canvas->height;
double sx = canvas_w / (double)widget_w;
double sy = canvas_h / (double)widget_h;
g_debug("<%f , %f>", x * sx, y * sy);
vektor_appstate_canvas_click(state, x * sx, y * sy);
}
void vektor_appstate_canvas_click(VektorAppState *state, double x, double y) {
@@ -29,13 +47,14 @@ void vektor_appstate_canvas_click(VektorAppState* state, double x, double y) {
if (state->selectedPrimitive == NULL) {
VektorPolyline *line = vektor_polyline_new();
VektorPrimitive linePrimitive = (VektorPrimitive){
.kind = VEKTOR_POLYLINE, .polyline = line
};
vektor_primitivebuffer_add_primitive(state->primitiveBuffer, linePrimitive);
VektorPrimitive linePrimitive =
(VektorPrimitive){.kind = VEKTOR_POLYLINE, .polyline = line};
vektor_primitivebuffer_add_primitive(state->primitiveBuffer,
linePrimitive);
state->selectedPrimitive =
&(state->primitiveBuffer->primitives[state->primitiveBuffer->count - 1]);
&(state->primitiveBuffer
->primitives[state->primitiveBuffer->count - 1]);
} else if (state->selectedPrimitive->kind != VEKTOR_POLYLINE) {
// selecting a tool resets the selection, so this condition
@@ -45,7 +64,6 @@ void vektor_appstate_canvas_click(VektorAppState* state, double x, double y) {
goto begin_click_dispatch; // retry
}
vektor_polyline_add_point(state->selectedPrimitive->polyline, pos);
}
@@ -68,18 +86,13 @@ void vektor_appstate_new(VektorWidgetState* wstate, VektorAppState* stateOut) {
vektor_canvas_init(wstate, stateOut->canvas);
// link all the buttons
g_signal_connect(
G_OBJECT(wstate->workspaceButtonLinetool),
"clicked", G_CALLBACK(appstate_set_tool), data_linetool);
g_signal_connect(G_OBJECT(wstate->workspaceButtonLinetool), "clicked",
G_CALLBACK(appstate_set_tool), data_linetool);
// Add click gesture to canvas
GtkGesture *canvasClickGesture = gtk_gesture_click_new();
g_signal_connect(
G_OBJECT(canvasClickGesture),
"pressed", G_CALLBACK(canvas_onclick), stateOut
);
gtk_widget_add_controller(
GTK_WIDGET(wstate->workspaceCanvas),
GTK_EVENT_CONTROLLER(canvasClickGesture)
);
g_signal_connect(G_OBJECT(canvasClickGesture), "pressed",
G_CALLBACK(canvas_onclick), stateOut);
gtk_widget_add_controller(GTK_WIDGET(wstate->workspaceCanvas),
GTK_EVENT_CONTROLLER(canvasClickGesture));
}

8
src/application/applicationstate.h
View File

@@ -1,14 +1,12 @@
#ifndef VKTR_APPSTATE_H
#define VKTR_APPSTATE_H
#include "../ui/uicontroller.h"
#include "../core/primitives.h"
#include "src/core/raster.h"
#include "../ui/uicontroller.h"
#include "../ui/vektorcanvas.h"
#include "src/core/raster.h"
typedef enum VektorAppTool {
VektorLineTool
} VektorAppTool;
typedef enum VektorAppTool { VektorLineTool } VektorAppTool;
typedef struct VektorAppState {
VektorAppTool selectedTool;

4
src/core/primitives.c
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@@ -50,8 +50,8 @@ void vektor_primitivebuffer_add_primitive(VektorPrimitiveBuffer *buffer,
VektorPrimitive prim) {
if (buffer->count >= buffer->capacity) {
buffer->capacity = buffer->capacity ? buffer->capacity * 2 : 4;
buffer->primitives =
realloc(buffer->primitives, sizeof(VektorPrimitive) * buffer->capacity);
buffer->primitives = realloc(
buffer->primitives, sizeof(VektorPrimitive) * buffer->capacity);
}
buffer->primitives[buffer->count++] = prim;
}

23
src/core/raster.c
View File

@@ -17,8 +17,8 @@ void vektor_line_flatten(EdgeBuffer *buffer, VektorLine line) {
void vektor_polyline_flatten(EdgeBuffer *buffer, VektorPolyline *line) {
for (size_t i = 0; i + 1 < line->count; i++) {
vektor_edgebuffer_add_edge(buffer,
(Edge){line->points[i], line->points[i + 1], 0});
vektor_edgebuffer_add_edge(
buffer, (Edge){line->points[i], line->points[i + 1], 0});
}
}
@@ -54,8 +54,18 @@ inline void vektor_framebuffer_putpixel(VektorFramebuffer *fb, int x, int y,
fb->pixels[i + 3] = color.a;
}
void vektor_framebuffer_drawline(VektorFramebuffer *fb, V2 a, V2 b,
void draw_filled_circle(VektorFramebuffer *fb, int cx, int cy, int r,
VektorColor color) {
for (int y = -r; y <= r; y++) {
int dx = (int)sqrt(r * r - y * y);
for (int x = -dx; x <= dx; x++) {
vektor_framebuffer_putpixel(fb, cx + x, cy + y, color);
}
}
}
void vektor_framebuffer_drawline(VektorFramebuffer *fb, V2 a, V2 b,
VektorColor color, double thickness) {
int x0 = (int)a.x;
int y0 = (int)a.y;
int x1 = (int)b.x;
@@ -68,7 +78,7 @@ void vektor_framebuffer_drawline(VektorFramebuffer *fb, V2 a, V2 b,
int err = dx + dy;
for (;;) {
vektor_framebuffer_putpixel(fb, x0, y0, color);
draw_filled_circle(fb, x0, y0, thickness / 2, color);
if (x0 == x1 && y0 == y1)
break;
@@ -84,7 +94,8 @@ void vektor_framebuffer_drawline(VektorFramebuffer *fb, V2 a, V2 b,
}
}
void vektor_framebuffer_rasterize(VektorFramebuffer *fb, VektorPrimitiveBuffer *prims) {
void vektor_framebuffer_rasterize(VektorFramebuffer *fb,
VektorPrimitiveBuffer *prims) {
EdgeBuffer edges = {0};
for (size_t i = 0; i < prims->count; i++) {
VektorPrimitive *p = &prims->primitives[i];
@@ -110,6 +121,6 @@ void vektor_framebuffer_rasterize(VektorFramebuffer *fb, VektorPrimitiveBuffer *
for (size_t i = 0; i < edges.count; i++) {
vektor_framebuffer_drawline(fb, edges.edges[i].p1, edges.edges[i].p2,
vektor_color_solid(255, 0, 255));
vektor_color_solid(255, 0, 255), 4);
}
}

5
src/core/raster.h
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@@ -38,8 +38,9 @@ void vektor_framebuffer_putpixel(VektorFramebuffer *fb, int x, int y,
VektorColor color);
void vektor_framebuffer_drawline(VektorFramebuffer *fb, V2 a, V2 b,
VektorColor color);
VektorColor color, double thickness);
void vektor_framebuffer_rasterize(VektorFramebuffer *fb, VektorPrimitiveBuffer *primitives);
void vektor_framebuffer_rasterize(VektorFramebuffer *fb,
VektorPrimitiveBuffer *primitives);
#endif // RASTER_H_

3
src/main.c
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@@ -4,11 +4,11 @@
#include "stdio.h"
#include "stdlib.h"
#include "./application/applicationstate.h"
#include "./core/raster.h"
#include "./ui/uicontroller.h"
#include "./ui/vektorcanvas.h"
#include "./util/color.h"
#include "./application/applicationstate.h"
static void on_map(GtkWidget *window, gpointer user_data) {
vektor_uictrl_map((VektorWidgetState *)user_data);
@@ -23,7 +23,6 @@ static void activate(GtkApplication *app, gpointer user_data) {
(VektorAppState *)malloc(sizeof(VektorAppState));
vektor_appstate_new(widget_state, app_state);
g_signal_connect(widget_state->window, "map", G_CALLBACK(on_map),
widget_state);

10
src/ui/uicontroller.c
View File

@@ -16,13 +16,13 @@ void vektor_uictrl_init(GtkApplication *app, VektorWidgetState *stateOut) {
// Load css
GtkCssProvider *provider = gtk_css_provider_new();
gtk_css_provider_load_from_path(provider, "./ui/main.css");
gtk_style_context_add_provider_for_display(gdk_display_get_default(),
GTK_STYLE_PROVIDER(provider),
GTK_STYLE_PROVIDER_PRIORITY_APPLICATION
);
gtk_style_context_add_provider_for_display(
gdk_display_get_default(), GTK_STYLE_PROVIDER(provider),
GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);
// populate state
stateOut->window = GTK_WINDOW(gtk_builder_get_object(builder, "main_window"));
stateOut->window =
GTK_WINDOW(gtk_builder_get_object(builder, "main_window"));
stateOut->workspacePaned =
GTK_PANED(gtk_builder_get_object(builder, "workspace_paned"));
stateOut->workspaceCanvas =

7
src/ui/vektorcanvas.c
View File

@@ -22,7 +22,8 @@ void vektor_canvas_init(VektorWidgetState *state, VektorCanvas *canvasOut) {
gtk_picture_set_paintable(canvasOut->canvasWidget,
GDK_PAINTABLE(canvasOut->canvasTexture));
gtk_picture_set_content_fit(GTK_PICTURE(canvasOut->canvasWidget),
GTK_CONTENT_FIT_CONTAIN);
// g_object_unref(bytes);
}
@@ -33,8 +34,8 @@ void vektor_canvas_update(VektorCanvas *canvas) {
g_bytes_new(canvas->canvasPixels, VKTR_CANVAS_SIZE);
g_object_unref(canvas->canvasTexture);
canvas->canvasTexture =
gdk_memory_texture_new(canvas->width, canvas->height, GDK_MEMORY_R8G8B8A8,
canvas->canvasTexture = gdk_memory_texture_new(
canvas->width, canvas->height, GDK_MEMORY_R8G8B8A8,
canvas->canvasPixelBytes, canvas->width * 4);
gtk_picture_set_paintable(canvas->canvasWidget,