Add Cairo backend for compositor
This commit is contained in:
K. Lange
parent
a6f96243e2
commit
8a6438b3d2
1
Makefile
1
Makefile
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@ -327,3 +327,4 @@ ifeq (,$(findstring clean,$(MAKECMDGOALS)))
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endif
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ext-freetype: base/lib/libtoaru_ext_freetype_fonts.so
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ext-cairo: base/lib/libtoaru_ext_cairo_renderer.so
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@ -0,0 +1,223 @@
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/* vim: tabstop=4 shiftwidth=4 noexpandtab
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* This file is part of ToaruOS and is released under the terms
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* of the NCSA / University of Illinois License - see LICENSE.md
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* Copyright (C) 2018 K. Lange
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*
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* Compositor Cairo renderer backend
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*/
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#include <math.h>
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#include <cairo.h>
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#include <toaru/yutani-server.h>
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struct cairo_renderer {
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cairo_t * framebuffer_ctx;
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cairo_surface_t * framebuffer_surface;
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};
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int renderer_alloc(yutani_globals_t * yg) {
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struct cairo_renderer * c = malloc(sizeof(struct cairo_renderer));
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c->framebuffer_ctx = NULL;
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c->framebuffer_surface = NULL;
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yg->renderer_ctx = c;
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return 0;
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}
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int renderer_init(yutani_globals_t * yg) {
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struct cairo_renderer * c = yg->renderer_ctx;
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int stride = yg->width * 4;
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c->framebuffer_surface = cairo_image_surface_create_for_data(
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yg->backend_framebuffer, CAIRO_FORMAT_ARGB32, yg->width, yg->height, stride);
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c->framebuffer_ctx = cairo_create(c->framebuffer_surface);
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return 0;
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}
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int renderer_add_clip(yutani_globals_t * yg, double x, double y, double w, double h) {
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struct cairo_renderer * c = yg->renderer_ctx;
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cairo_rectangle(c->framebuffer_ctx, x, y, w, h);
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return 0;
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}
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int renderer_set_clip(yutani_globals_t * yg) {
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struct cairo_renderer * c = yg->renderer_ctx;
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cairo_clip(c->framebuffer_ctx);
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return 0;
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}
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int renderer_push_state(yutani_globals_t * yg) {
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struct cairo_renderer * c = yg->renderer_ctx;
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cairo_save(c->framebuffer_ctx);
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return 0;
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}
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int renderer_pop_state(yutani_globals_t * yg) {
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struct cairo_renderer * c = yg->renderer_ctx;
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cairo_restore(c->framebuffer_ctx);
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return 0;
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}
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int renderer_destroy(yutani_globals_t * yg) {
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struct cairo_renderer * c = yg->renderer_ctx;
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cairo_destroy(c->framebuffer_ctx);
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cairo_surface_destroy(c->framebuffer_surface);
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return 0;
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}
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int renderer_blit_window(yutani_globals_t * yg, yutani_server_window_t * window, int x, int y) {
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/* Obtain the previously initialized cairo contexts */
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struct cairo_renderer * c = yg->renderer_ctx;
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cairo_t * cr = c->framebuffer_ctx;
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/* Window stride is always 4 bytes per pixel... */
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int stride = window->width * 4;
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/* Initialize a cairo surface object for this window */
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cairo_surface_t * surf = cairo_image_surface_create_for_data(
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window->buffer, CAIRO_FORMAT_ARGB32, window->width, window->height, stride);
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/* Save cairo context */
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cairo_save(cr);
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/*
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* Offset the rendering context appropriately for the position of the window
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* based on the modifier paramters
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*/
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cairo_identity_matrix(cr);
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cairo_translate(cr, x, y);
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/* Top and bottom windows can not be rotated. */
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if (!yutani_window_is_top(yg, window) && !yutani_window_is_bottom(yg, window)) {
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/* Calcuate radians from degrees */
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if (window->rotation != 0) {
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double r = M_PI * (((double)window->rotation) / 180.0);
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/* Rotate the render context about the center of the window */
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cairo_translate(cr, (int)( window->width / 2), (int)( (int)window->height / 2));
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cairo_rotate(cr, r);
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cairo_translate(cr, (int)(-window->width / 2), (int)(-window->height / 2));
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/* Prefer faster filter when rendering rotated windows */
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cairo_pattern_t * p = cairo_get_source(cr);
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cairo_pattern_set_filter(p, CAIRO_FILTER_FAST);
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}
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if (window == yg->resizing_window) {
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double x_scale = (double)yg->resizing_w / (double)yg->resizing_window->width;
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double y_scale = (double)yg->resizing_h / (double)yg->resizing_window->height;
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if (x_scale < 0.00001) {
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x_scale = 0.00001;
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}
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if (y_scale < 0.00001) {
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y_scale = 0.00001;
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}
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cairo_translate(cr, (int)yg->resizing_offset_x, (int)yg->resizing_offset_y);
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cairo_scale(cr, x_scale, y_scale);
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}
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}
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if (window->anim_mode) {
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int frame = yutani_time_since(yg, window->anim_start);
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if (frame >= yutani_animation_lengths[window->anim_mode]) {
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if (window->anim_mode == YUTANI_EFFECT_FADE_OUT) {
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list_insert(yg->windows_to_remove, window);
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goto draw_finish;
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}
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window->anim_mode = 0;
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window->anim_start = 0;
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goto draw_window;
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} else {
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switch (window->anim_mode) {
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case YUTANI_EFFECT_FADE_OUT:
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{
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frame = yutani_animation_lengths[window->anim_mode] - frame;
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}
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case YUTANI_EFFECT_FADE_IN:
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{
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double time_diff = ((double)frame / (float)yutani_animation_lengths[window->anim_mode]);
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if (!yutani_window_is_top(yg, window) && !yutani_window_is_bottom(yg, window) &&
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!(window->server_flags & YUTANI_WINDOW_FLAG_ALT_ANIMATION)) {
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double x = 0.75 + time_diff * 0.25;
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int t_x = (window->width * (1.0 - x)) / 2;
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int t_y = (window->height * (1.0 - x)) / 2;
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cairo_translate(cr, t_x, t_y);
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cairo_scale(cr, x, x);
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}
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cairo_set_source_surface(cr, surf, 0, 0);
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if (window->opacity != 255) {
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cairo_paint_with_alpha(cr, time_diff * (double)(window->opacity) / 255.0);
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} else {
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cairo_paint_with_alpha(cr, time_diff);
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}
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}
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break;
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default:
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goto draw_window;
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break;
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}
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}
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} else {
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draw_window:
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/* Paint window */
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cairo_set_source_surface(cr, surf, 0, 0);
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if (window->opacity != 255) {
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cairo_paint_with_alpha(cr, (float)(window->opacity)/255.0);
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} else {
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cairo_paint(cr);
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}
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}
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draw_finish:
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/* Clean up */
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cairo_surface_destroy(surf);
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/* Restore context stack */
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cairo_restore(cr);
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#if YUTANI_DEBUG_WINDOW_BOUNDS
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/*
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* If window bound debugging is enabled, we also draw a box
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* representing the rectangular (possibly rotated) boundary
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* for a window texture.
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*/
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if (yg->debug_bounds) {
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cairo_save(cr);
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int32_t t_x, t_y;
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int32_t s_x, s_y;
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int32_t r_x, r_y;
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int32_t q_x, q_y;
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yutani_window_to_device(window, 0, 0, &t_x, &t_y);
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yutani_window_to_device(window, window->width, window->height, &s_x, &s_y);
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yutani_window_to_device(window, 0, window->height, &r_x, &r_y);
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yutani_window_to_device(window, window->width, 0, &q_x, &q_y);
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uint32_t x = yutani_color_for_wid(window->wid);
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cairo_set_source_rgba(cr,
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_RED(x) / 255.0,
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_GRE(x) / 255.0,
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_BLU(x) / 255.0,
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0.7
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);
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cairo_move_to(cr, t_x, t_y);
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cairo_line_to(cr, r_x, r_y);
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cairo_line_to(cr, s_x, s_y);
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cairo_line_to(cr, q_x, q_y);
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cairo_fill(cr);
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cairo_restore(cr);
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}
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#endif
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return 0;
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}
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