feat: add round titlebars (#26)

1 files changed, 90 insertions, 4 deletions

diff --git a/sway/desktop/fx_renderer.c b/sway/desktop/fx_renderer.c
index 7af4a313..2b5ba060 100644
--- a/sway/desktop/fx_renderer.c
+++ b/sway/desktop/fx_renderer.c
@@ -20,6 +20,8 @@
 // shaders
 #include "quad_vert_src.h"
 #include "quad_frag_src.h"
+#include "quad_round_tl_frag_src.h"
+#include "quad_round_tr_frag_src.h"
 #include "corner_frag_src.h"
 #include "tex_vert_src.h"
 #include "tex_rgba_frag_src.h"
@@ -97,6 +99,22 @@ bool init_frag_shader(struct gles2_tex_shader *shader, GLuint prog) {
 	shader->size = glGetUniformLocation(prog, "size");
 	shader->position = glGetUniformLocation(prog, "position");
 	shader->radius = glGetUniformLocation(prog, "radius");
+	shader->has_titlebar = glGetUniformLocation(prog, "has_titlebar");
+	return true;
+}
+
+// initializes a provided rounded quad shader and returns false if unsuccessful
+bool init_rounded_quad_shader(struct rounded_quad_shader *shader, GLuint prog) {
+	shader->program = prog;
+	if (!shader->program) {
+		return false;
+	}
+	shader->proj = glGetUniformLocation(prog, "proj");
+	shader->color = glGetUniformLocation(prog, "color");
+	shader->pos_attrib = glGetAttribLocation(prog, "pos");
+	shader->size = glGetUniformLocation(prog, "size");
+	shader->position = glGetUniformLocation(prog, "position");
+	shader->radius = glGetUniformLocation(prog, "radius");
 	return true;
 }
 
@@ -133,6 +151,7 @@ struct fx_renderer *fx_renderer_create(struct wlr_egl *egl) {
 	// init shaders
 	GLuint prog;
 
+	// quad fragment shader
 	prog = link_program(quad_vert_src, quad_frag_src);
 	renderer->shaders.quad.program = prog;
 	if (!renderer->shaders.quad.program) {
@@ -142,7 +161,17 @@ struct fx_renderer *fx_renderer_create(struct wlr_egl *egl) {
 	renderer->shaders.quad.color = glGetUniformLocation(prog, "color");
 	renderer->shaders.quad.pos_attrib = glGetAttribLocation(prog, "pos");
 
-	// Border corners
+	// rounded quad fragment shaders
+	prog = link_program(quad_vert_src, quad_round_tl_frag_src);
+	if (!init_rounded_quad_shader(&renderer->shaders.rounded_tl_quad, prog)) {
+		goto error;
+	}
+	prog = link_program(quad_vert_src, quad_round_tr_frag_src);
+	if (!init_rounded_quad_shader(&renderer->shaders.rounded_tr_quad, prog)) {
+		goto error;
+	}
+
+	// Border corner shader
 	prog = link_program(quad_vert_src, corner_frag_src);
 	renderer->shaders.corner.program = prog;
 	if (!renderer->shaders.corner.program) {
@@ -225,7 +254,7 @@ void fx_renderer_scissor(struct wlr_box *box) {
 
 bool fx_render_subtexture_with_matrix(struct fx_renderer *renderer, struct wlr_texture *wlr_texture,
 		const struct wlr_fbox *src_box, const struct wlr_box *dst_box, const float matrix[static 9],
-		float alpha, int radius) {
+		float alpha, int radius, const bool has_titlebar) {
 
 	assert(wlr_texture_is_gles2(wlr_texture));
 	struct wlr_gles2_texture_attribs texture_attrs;
@@ -282,6 +311,7 @@ bool fx_render_subtexture_with_matrix(struct fx_renderer *renderer, struct wlr_t
 	glUniformMatrix3fv(shader->proj, 1, GL_FALSE, gl_matrix);
 	glUniform1i(shader->tex, 0);
 	glUniform1f(shader->alpha, alpha);
+	glUniform1f(shader->has_titlebar, has_titlebar);
 
 	// rounded corners
 	glUniform2f(shader->size, dst_box->width, dst_box->height);
@@ -316,14 +346,15 @@ bool fx_render_subtexture_with_matrix(struct fx_renderer *renderer, struct wlr_t
 }
 
 bool fx_render_texture_with_matrix(struct fx_renderer *renderer, struct wlr_texture *wlr_texture,
-		const struct wlr_box *dst_box, const float matrix[static 9], float alpha, int radius) {
+		const struct wlr_box *dst_box, const float matrix[static 9], float alpha, int radius,
+		const bool has_titlebar) {
 	struct wlr_fbox src_box = {
 		.x = 0,
 		.y = 0,
 		.width = wlr_texture->width,
 		.height = wlr_texture->height,
 	};
-	return fx_render_subtexture_with_matrix(renderer, wlr_texture, &src_box, dst_box, matrix, alpha, radius);
+	return fx_render_subtexture_with_matrix(renderer, wlr_texture, &src_box, dst_box, matrix, alpha, radius, has_titlebar);
 }
 
 void fx_render_rect(struct fx_renderer *renderer, const struct wlr_box *box,
@@ -364,6 +395,61 @@ void fx_render_rect(struct fx_renderer *renderer, const struct wlr_box *box,
 	glDisableVertexAttribArray(renderer->shaders.quad.pos_attrib);
 }
 
+void fx_render_rounded_rect(struct fx_renderer *renderer, const struct wlr_box *box,
+		const float color[static 4], const float projection[static 9],
+		int radius, enum corner_location corner_location) {
+	if (box->width == 0 || box->height == 0) {
+		return;
+	}
+	assert(box->width > 0 && box->height > 0);
+
+	struct rounded_quad_shader *shader = NULL;
+
+	switch (corner_location) {
+		case TOP_LEFT:
+			shader = &renderer->shaders.rounded_tl_quad;
+			break;
+		case TOP_RIGHT:
+			shader = &renderer->shaders.rounded_tr_quad;
+			break;
+		default:
+			sway_log(SWAY_ERROR, "Invalid Corner Location. Aborting render");
+			abort();
+	}
+
+	float matrix[9];
+	wlr_matrix_project_box(matrix, box, WL_OUTPUT_TRANSFORM_NORMAL, 0, projection);
+
+	float gl_matrix[9];
+	wlr_matrix_multiply(gl_matrix, renderer->projection, matrix);
+
+	// TODO: investigate why matrix is flipped prior to this cmd
+	// wlr_matrix_multiply(gl_matrix, flip_180, gl_matrix);
+
+	wlr_matrix_transpose(gl_matrix, gl_matrix);
+
+	glEnable(GL_BLEND);
+
+	glUseProgram(shader->program);
+
+	glUniformMatrix3fv(shader->proj, 1, GL_FALSE, gl_matrix);
+	glUniform4f(shader->color, color[0], color[1], color[2], color[3]);
+
+	// rounded corners
+	glUniform2f(shader->size, box->width, box->height);
+	glUniform2f(shader->position, box->x, box->y);
+	glUniform1f(shader->radius, radius);
+
+	glVertexAttribPointer(shader->pos_attrib, 2, GL_FLOAT, GL_FALSE,
+			0, verts);
+
+	glEnableVertexAttribArray(shader->pos_attrib);
+
+	glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
+
+	glDisableVertexAttribArray(shader->pos_attrib);
+}
+
 void fx_render_border_corner(struct fx_renderer *renderer, const struct wlr_box *box,
 		const float color[static 4], const float projection[static 9],
 		enum corner_location corner_location, int radius, int border_thickness) {