win32

commit ec2d4e992ae0351e5a149145a380407c17be5f75
parent 5bc8a86084c7a23fa1a5d8dbcb963472f66a2ae6
Author: Matsuda Kenji <info@mtkn.jp>
Date:   Fri, 19 Dec 2025 21:44:58 +0900

create 3 pictures and composite them on the screen

Diffstat:
M
xcb.c
 | 
30
++++++++++++++++++++++++++++++

1 file changed, 30 insertions(+), 0 deletions(-)
diff --git a/xcb.c b/xcb.c
@@ -61,12 +61,42 @@ int main(void) {
 		visual32.visual_id,
 		XCB_CW_BORDER_PIXEL|XCB_CW_COLORMAP, &attr32);
 
+	int width1 = 300, height1 = 300;
+	xcb_pixmap_t pixmap32_1 = xcb_generate_id(conn);
+	xcb_create_pixmap(conn, 32, pixmap32_1, window32, width1, height1);
+	xcb_render_picture_t picture32_1 = xcb_generate_id(conn);
+	xcb_render_create_picture(conn, picture32_1, pixmap32_1, pictformat32, 0, NULL);
+	xcb_render_color_t color1 = { .red = 0xffff, .green = 0, .blue = 0, .alpha = 0x3fff };
+	xcb_rectangle_t rectangle1 = { .x = 0, .y = 0, .width = width1, height = height1 };
+	xcb_render_fill_rectangles(conn, XCB_RENDER_PICT_OP_SRC, picture32_1, color1, 1, &rectangle1);
+
+	int width2 = 300, height2 = 200;
+	xcb_pixmap_t pixmap32_2 = xcb_generate_id(conn);
+	xcb_create_pixmap(conn, 32, pixmap32_2, window32, width2, height1);
+	xcb_render_picture_t picture32_2 = xcb_generate_id(conn);
+	xcb_render_create_picture(conn, picture32_2, pixmap32_2, pictformat32, 0, NULL);
+	xcb_render_color_t color2 = { .red = 0, .green = 0xffff, .blue = 0, .alpha = 0x3fff };
+	xcb_rectangle_t rectangle2 = { .x = 0, .y = 0, .width = width2, height = height2 };
+	xcb_render_fill_rectangles(conn, XCB_RENDER_PICT_OP_SRC, picture32_2, color2, 2, &rectangle1);
+
+	int width3 = 300, height3 = 300;
+	xcb_pixmap_t pixmap32_3 = xcb_generate_id(conn);
+	xcb_create_pixmap(conn, 32, pixmap32_3, window32, width3, height1);
+	xcb_render_picture_t picture32_3 = xcb_generate_id(conn);
+	xcb_render_create_picture(conn, picture32_3, pixmap32_3, pictformat32, 0, NULL);
+	xcb_render_color_t color3 = { .red = 0, .green = 0, .blue = 0xffff, .alpha = 0x3fff };
+	xcb_rectangle_t rectangle3 = { .x = 0, .y = 0, .width = width3, height = height3 };
+	xcb_render_fill_rectangles(conn, XCB_RENDER_PICT_OP_SRC, picture32_3, color3, 3, &rectangle1);
+
 	xcb_flush(conn);
 
 	int quit = 0;
 	xcb_generic_event_t *event;
 	while (!quit) {
 		xcb_render_fill_rectangles(conn, XCB_RENDER_PICT_OP_SRC, picture, color, 1, &rectangle);
+		xcb_render_composite(conn, XCB_RENDER_PICT_OP_OVER, picture32_1, 0, picture, 0, 0, 0, 0, 100, 100, width1, height1);
+		xcb_render_composite(conn, XCB_RENDER_PICT_OP_OVER, picture32_2, 0, picture, 0, 0, 0, 0, 200, 150, width2, height2);
+		xcb_render_composite(conn, XCB_RENDER_PICT_OP_OVER, picture32_3, 0, picture, 0, 0, 0, 0, 150, 200, width3, height3);
 		xcb_flush(conn);
 
 		event = xcb_wait_for_event(conn);