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#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include <wlr/render/interface.h>
#include <wlr/render/wlr_renderer.h>
#include <wlr/types/wlr_matrix.h>
#include "render/pass.h"
struct wlr_render_pass_legacy {
struct wlr_render_pass base;
struct wlr_renderer *renderer;
int width, height;
};
void wlr_render_pass_init(struct wlr_render_pass *render_pass,
const struct wlr_render_pass_impl *impl) {
assert(impl->submit && impl->add_texture && impl->add_rect);
*render_pass = (struct wlr_render_pass){
.impl = impl,
};
}
bool wlr_render_pass_submit(struct wlr_render_pass *render_pass) {
return render_pass->impl->submit(render_pass);
}
void wlr_render_pass_add_texture(struct wlr_render_pass *render_pass,
const struct wlr_render_texture_options *options) {
// make sure the texture source box does not try and sample outside of the
// texture
if (!wlr_fbox_empty(&options->src_box)) {
const struct wlr_fbox *box = &options->src_box;
assert(box->x >= 0 && box->y >= 0 &&
box->x + box->width <= options->texture->width &&
box->y + box->height <= options->texture->height);
}
render_pass->impl->add_texture(render_pass, options);
}
void wlr_render_pass_add_rect(struct wlr_render_pass *render_pass,
const struct wlr_render_rect_options *options) {
assert(options->box.width >= 0 && options->box.height >= 0);
if (wlr_box_empty(&options->box)) {
return;
}
render_pass->impl->add_rect(render_pass, options);
}
void wlr_render_texture_options_get_src_box(const struct wlr_render_texture_options *options,
struct wlr_fbox *box) {
*box = options->src_box;
if (wlr_fbox_empty(box)) {
*box = (struct wlr_fbox){
.width = options->texture->width,
.height = options->texture->height,
};
}
}
void wlr_render_texture_options_get_dst_box(const struct wlr_render_texture_options *options,
struct wlr_box *box) {
*box = options->dst_box;
if (wlr_box_empty(box)) {
box->width = options->texture->width;
box->height = options->texture->height;
}
}
float wlr_render_texture_options_get_alpha(const struct wlr_render_texture_options *options) {
if (options->alpha == NULL) {
return 1;
}
return *options->alpha;
}
static const struct wlr_render_pass_impl legacy_impl;
static struct wlr_render_pass_legacy *legacy_pass_from_pass(struct wlr_render_pass *pass) {
assert(pass->impl == &legacy_impl);
struct wlr_render_pass_legacy *legacy = wl_container_of(pass, legacy, base);
return legacy;
}
static bool legacy_submit(struct wlr_render_pass *wlr_pass) {
struct wlr_render_pass_legacy *pass = legacy_pass_from_pass(wlr_pass);
wlr_renderer_end(pass->renderer);
free(pass);
return true;
}
static void get_clip_region(struct wlr_render_pass_legacy *pass,
const pixman_region32_t *in, pixman_region32_t *out) {
if (in != NULL) {
pixman_region32_init(out);
pixman_region32_copy(out, in);
} else {
pixman_region32_init_rect(out, 0, 0, pass->width, pass->height);
}
}
static void scissor(struct wlr_renderer *renderer, const pixman_box32_t *rect) {
struct wlr_box box = {
.x = rect->x1,
.y = rect->y1,
.width = rect->x2 - rect->x1,
.height = rect->y2 - rect->y1,
};
wlr_renderer_scissor(renderer, &box);
}
static void legacy_add_texture(struct wlr_render_pass *wlr_pass,
const struct wlr_render_texture_options *options) {
struct wlr_render_pass_legacy *pass = legacy_pass_from_pass(wlr_pass);
struct wlr_texture *texture = options->texture;
struct wlr_fbox src_box;
wlr_render_texture_options_get_src_box(options, &src_box);
struct wlr_box dst_box;
wlr_render_texture_options_get_dst_box(options, &dst_box);
float alpha = wlr_render_texture_options_get_alpha(options);
float proj[9], matrix[9];
wlr_matrix_identity(proj);
wlr_matrix_project_box(matrix, &dst_box, options->transform, 0.0, proj);
pixman_region32_t clip;
get_clip_region(pass, options->clip, &clip);
float black[4] = {0};
int rects_len = 0;
const pixman_box32_t *rects = pixman_region32_rectangles(&clip, &rects_len);
for (int i = 0; i < rects_len; i++) {
scissor(pass->renderer, &rects[i]);
if (options->blend_mode == WLR_RENDER_BLEND_MODE_NONE) {
wlr_renderer_clear(pass->renderer, black);
}
wlr_render_subtexture_with_matrix(pass->renderer, texture, &src_box, matrix, alpha);
}
wlr_renderer_scissor(pass->renderer, NULL);
pixman_region32_fini(&clip);
}
static void legacy_add_rect(struct wlr_render_pass *wlr_pass,
const struct wlr_render_rect_options *options) {
struct wlr_render_pass_legacy *pass = legacy_pass_from_pass(wlr_pass);
float proj[9], matrix[9];
wlr_matrix_identity(proj);
wlr_matrix_project_box(matrix, &options->box, WL_OUTPUT_TRANSFORM_NORMAL, 0.0, proj);
pixman_region32_t clip;
get_clip_region(pass, options->clip, &clip);
pixman_region32_intersect_rect(&clip, &clip,
options->box.x, options->box.y, options->box.width, options->box.height);
float color[4] = {
options->color.r,
options->color.g,
options->color.b,
options->color.a,
};
int rects_len = 0;
const pixman_box32_t *rects = pixman_region32_rectangles(&clip, &rects_len);
for (int i = 0; i < rects_len; i++) {
scissor(pass->renderer, &rects[i]);
switch (options->blend_mode) {
case WLR_RENDER_BLEND_MODE_PREMULTIPLIED:
wlr_render_quad_with_matrix(pass->renderer, color, matrix);
break;
case WLR_RENDER_BLEND_MODE_NONE:
wlr_renderer_clear(pass->renderer, color);
break;
}
}
wlr_renderer_scissor(pass->renderer, NULL);
pixman_region32_fini(&clip);
}
static const struct wlr_render_pass_impl legacy_impl = {
.submit = legacy_submit,
.add_texture = legacy_add_texture,
.add_rect = legacy_add_rect,
};
struct wlr_render_pass *begin_legacy_buffer_render_pass(struct wlr_renderer *renderer,
struct wlr_buffer *buffer) {
if (renderer->rendering) {
return NULL;
}
struct wlr_render_pass_legacy *pass = calloc(1, sizeof(*pass));
if (pass == NULL) {
return NULL;
}
wlr_render_pass_init(&pass->base, &legacy_impl);
pass->renderer = renderer;
pass->width = buffer->width;
pass->height = buffer->height;
if (!wlr_renderer_begin_with_buffer(renderer, buffer)) {
free(pass);
return NULL;
}
return &pass->base;
}
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