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implement Paint as combination of GDK, GSK and Pango attributes

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This commit is contained in:
Julian Winkler
2024-12-21 14:24:33 +01:00
parent ba302d87ec
commit 7695aadf91
9 changed files with 350 additions and 170 deletions
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81
src/api-impl-jni/graphics/android_graphics_GskCanvas.c
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@@ -3,58 +3,41 @@
#include <pango/pango.h>
#include "../defines.h"
#include "AndroidPaint.h"
#include "../generated_headers/android_graphics_GskCanvas.h"
#define STYLE_FILL 0
#define STYLE_STROKE 1
#define STYLE_FILL_AND_STROKE 2
#define GDK_RGBA_INIT(color) ((GdkRGBA){ \
.red = ((color >> 16) & 0xFF) / 255.f, \
.green = ((color >> 8) & 0xFF) / 255.f, \
.blue = ((color >> 0) & 0xFF) / 255.f, \
.alpha = ((color >> 24) & 0xFF) / 255.f})
JNIEXPORT void JNICALL Java_android_graphics_GskCanvas_native_1drawBitmap(JNIEnv *env, jclass this_class, jlong snapshot_ptr, jlong texture_ptr, jint x, jint y, jint width, jint height, jint color)
JNIEXPORT void JNICALL Java_android_graphics_GskCanvas_native_1drawBitmap(JNIEnv *env, jclass this_class, jlong snapshot_ptr, jlong texture_ptr, jint x, jint y, jint width, jint height, jlong paint_ptr)
{
GdkSnapshot *snapshot = (GdkSnapshot *)_PTR(snapshot_ptr);
GdkTexture *texture = GDK_TEXTURE(_PTR(texture_ptr));
if (color) { // use only alpha from pixbuf, color is fixed
graphene_matrix_t color_matrix;
graphene_vec4_t color_offset;
graphene_matrix_init_from_float(&color_matrix, (float[]){
0, 0, 0, 0,
0, 0, 0, 0,
0, 0, 0, 0,
0, 0, 0, 1,
});
graphene_vec4_init(&color_offset, ((color >> 16) & 0xFF) / 255.f, ((color >> 8) & 0xFF) / 255.f, ((color >> 0) & 0xFF) / 255.f, 0);
gtk_snapshot_push_color_matrix(snapshot, &color_matrix, &color_offset);
struct AndroidPaint *paint = _PTR(paint_ptr);
if (paint->use_color_filter) {
gtk_snapshot_push_color_matrix(snapshot, &paint->color_matrix, &paint->color_offset);
}
gtk_snapshot_append_texture(snapshot, texture, &GRAPHENE_RECT_INIT(x, y, width, height));
if (color)
if (paint->use_color_filter)
gtk_snapshot_pop(snapshot);
}
JNIEXPORT void JNICALL Java_android_graphics_GskCanvas_native_1drawRect(JNIEnv *env, jclass this_class, jlong snapshot_ptr, jfloat left, jfloat top, jfloat right, jfloat bottom, jint color)
JNIEXPORT void JNICALL Java_android_graphics_GskCanvas_native_1drawRect(JNIEnv *env, jclass this_class, jlong snapshot_ptr, jfloat left, jfloat top, jfloat right, jfloat bottom, jlong paint_ptr)
{
GdkSnapshot *snapshot = (GdkSnapshot *)_PTR(snapshot_ptr);
GdkRGBA gdk_color = GDK_RGBA_INIT(color);
struct AndroidPaint *paint = _PTR(paint_ptr);
graphene_rect_t bounds = GRAPHENE_RECT_INIT(left, top, right - left, bottom - top);
gtk_snapshot_append_color(snapshot, &gdk_color, &bounds);
gtk_snapshot_append_color(snapshot, &paint->color, &bounds);
}
JNIEXPORT void JNICALL Java_android_graphics_GskCanvas_native_1drawPath(JNIEnv *env, jclass this_class, jlong snapshot_ptr, jlong path_ptr, jint color, jint style)
JNIEXPORT void JNICALL Java_android_graphics_GskCanvas_native_1drawPath(JNIEnv *env, jclass this_class, jlong snapshot_ptr, jlong path_ptr, jlong paint_ptr)
{
GtkSnapshot *snapshot = GTK_SNAPSHOT(_PTR(snapshot_ptr));
GskPath *path = _PTR(path_ptr);
GdkRGBA gdk_color = GDK_RGBA_INIT(color);
if (style == STYLE_STROKE || style == STYLE_FILL_AND_STROKE) {
gtk_snapshot_append_stroke(snapshot, path, gsk_stroke_new(2), &gdk_color);
struct AndroidPaint *paint = _PTR(paint_ptr);
if (paint->is_stroke) {
gtk_snapshot_append_stroke(snapshot, path, paint->gsk_stroke, &paint->color);
}
if (style == STYLE_FILL || style == STYLE_FILL_AND_STROKE) {
gtk_snapshot_append_fill(snapshot, path, GSK_FILL_RULE_WINDING, &gdk_color);
if (paint->is_fill) {
gtk_snapshot_append_fill(snapshot, path, GSK_FILL_RULE_WINDING, &paint->color);
}
}
@@ -82,63 +65,63 @@ JNIEXPORT void JNICALL Java_android_graphics_GskCanvas_native_1restore(JNIEnv *e
gtk_snapshot_restore(snapshot);
}
JNIEXPORT void JNICALL Java_android_graphics_GskCanvas_native_1drawLine(JNIEnv *env, jclass this_class, jlong snapshot_ptr, jfloat x0, jfloat y0, jfloat x1, jfloat y1, jint color, jfloat stroke_width)
JNIEXPORT void JNICALL Java_android_graphics_GskCanvas_native_1drawLine(JNIEnv *env, jclass this_class, jlong snapshot_ptr, jfloat x0, jfloat y0, jfloat x1, jfloat y1, jlong paint_ptr)
{
if (isnan(x0) || isnan(y0) || isnan(x1) || isnan(y1)) {
return;
}
GdkSnapshot *snapshot = GTK_SNAPSHOT(_PTR(snapshot_ptr));
GdkRGBA gdk_color = GDK_RGBA_INIT(color);
struct AndroidPaint *paint = _PTR(paint_ptr);
gtk_snapshot_save(snapshot);
gtk_snapshot_translate(snapshot, &GRAPHENE_POINT_INIT(x0, y0));
float rotation = atan2(y1 - y0, x1 - x0);
gtk_snapshot_rotate(snapshot, rotation * 180 / M_PI);
float length = sqrt((x1 - x0) * (x1 - x0) + (y1 - y0) * (y1 - y0));
gtk_snapshot_append_color(snapshot, &gdk_color, &GRAPHENE_RECT_INIT(0, -stroke_width / 2, length, stroke_width));
float stroke_width = gsk_stroke_get_line_width(paint->gsk_stroke);
gtk_snapshot_append_color(snapshot, &paint->color, &GRAPHENE_RECT_INIT(0, -stroke_width / 2, length, stroke_width));
gtk_snapshot_restore(snapshot);
}
extern GtkWidget *window;
JNIEXPORT void JNICALL Java_android_graphics_GskCanvas_native_1drawText(JNIEnv *env, jclass this_class, jlong snapshot_ptr, jstring text, jfloat x, jfloat y, jint color, jfloat text_size)
JNIEXPORT void JNICALL Java_android_graphics_GskCanvas_native_1drawText(JNIEnv *env, jclass this_class, jlong snapshot_ptr, jstring text, jfloat x, jfloat y, jlong paint_ptr)
{
GdkSnapshot *snapshot = GTK_SNAPSHOT(_PTR(snapshot_ptr));
GdkRGBA gdk_color = GDK_RGBA_INIT(color);
struct AndroidPaint *paint = _PTR(paint_ptr);
PangoLayout *layout = pango_layout_new(gtk_widget_get_pango_context(window));
PangoFontDescription *description = pango_font_description_new();
pango_font_description_set_size(description, text_size * .8f * PANGO_SCALE);
pango_layout_set_font_description(layout, description);
pango_layout_set_font_description(layout, paint->font);
const char *str = (*env)->GetStringUTFChars(env, text, NULL);
pango_layout_set_text(layout, str, -1);
(*env)->ReleaseStringUTFChars(env, text, str);
gtk_snapshot_translate(snapshot, &GRAPHENE_POINT_INIT(x, y));
gtk_snapshot_append_layout(snapshot, layout, &gdk_color);
gtk_snapshot_append_layout(snapshot, layout, &paint->color);
gtk_snapshot_translate(snapshot, &GRAPHENE_POINT_INIT(-x, -y));
g_object_unref(layout);
g_object_unref(description);
}
JNIEXPORT void JNICALL Java_android_graphics_GskCanvas_native_1drawRoundRect(JNIEnv *env, jclass this_class, jlong snapshot_ptr, jfloat left, jfloat top, jfloat right, jfloat bottom, jfloat rx, jfloat ry, jint color, jfloat width, int style)
JNIEXPORT void JNICALL Java_android_graphics_GskCanvas_native_1drawRoundRect(JNIEnv *env, jclass this_class, jlong snapshot_ptr, jfloat left, jfloat top, jfloat right, jfloat bottom, jfloat rx, jfloat ry, jlong paint_ptr)
{
GdkSnapshot *snapshot = (GdkSnapshot *)_PTR(snapshot_ptr);
struct AndroidPaint *paint = _PTR(paint_ptr);
GdkRGBA gdk_color[4];
for (int i = 0; i < 4; i++) {
gdk_color[i].red = (float)((color >> 16) & 0xff) / 0xff;
gdk_color[i].green = (float)((color >> 8) & 0xff) / 0xff;
gdk_color[i].blue = (float)((color >> 0) & 0xff) / 0xff;
gdk_color[i].alpha = (float)((color >> 24) & 0xff) / 0xff;
gdk_color[i].red = paint->color.red;
gdk_color[i].green = paint->color.green;
gdk_color[i].blue = paint->color.blue;
gdk_color[i].alpha = paint->color.alpha;
}
GskRoundedRect round_rect = {
.bounds = GRAPHENE_RECT_INIT(left, top, right - left, bottom - top),
.corner = {{rx, ry}, {rx, ry}, {rx, ry}, {rx, ry}},
};
float width = gsk_stroke_get_line_width(paint->gsk_stroke);
const float widths[4] = {width, width, width, width};
if (style == STYLE_FILL || style == STYLE_FILL_AND_STROKE) {
if (paint->is_fill) {
gtk_snapshot_push_rounded_clip(snapshot, &round_rect);
gtk_snapshot_append_color(snapshot, gdk_color, &round_rect.bounds);
gtk_snapshot_pop(snapshot);
}
if (style == STYLE_STROKE || style == STYLE_FILL_AND_STROKE) {
if (paint->is_stroke) {
gtk_snapshot_append_border(snapshot, &round_rect, widths, gdk_color);
}
}