Merge pull request #722 from emersion/matrix-redesign

Matrix redesign

types/meson.build

@@ -6,11 +6,13 @@ lib_wlr_types = static_library(
 		'wlr_cursor.c',
 		'wlr_data_device.c',
 		'wlr_gamma_control.c',
+		'wlr_idle_inhibit_v1.c',
 		'wlr_idle.c',
 		'wlr_input_device.c',
 		'wlr_keyboard.c',
 		'wlr_linux_dmabuf.c',
 		'wlr_list.c',
+		'wlr_matrix.c',
 		'wlr_output_damage.c',
 		'wlr_output_layout.c',
 		'wlr_output.c',
@@ -28,7 +30,6 @@ lib_wlr_types = static_library(
 		'wlr_xcursor_manager.c',
 		'wlr_xdg_shell_v6.c',
 		'wlr_xdg_shell.c',
-		'wlr_idle_inhibit_v1.c',
 	),
 	include_directories: wlr_inc,
 	dependencies: [pixman, xkbcommon, wayland_server, wlr_protos],

types/wlr_matrix.c

@@ -0,0 +1,160 @@
+#include <math.h>
+#include <string.h>
+#include <wayland-server-protocol.h>
+#include <wlr/types/wlr_matrix.h>
+#include <wlr/types/wlr_box.h>
+#include <wlr/types/wlr_output.h>
+
+void wlr_matrix_identity(float mat[static 9]) {
+	static const float identity[9] = {
+		1.0f, 0.0f, 0.0f,
+		0.0f, 1.0f, 0.0f,
+		0.0f, 0.0f, 1.0f,
+	};
+	memcpy(mat, identity, sizeof(identity));
+}
+
+void wlr_matrix_multiply(float mat[static 9], const float a[static 9],
+		const float b[static 9]) {
+	float product[9];
+
+	product[0] = a[0]*b[0] + a[1]*b[3] + a[2]*b[6];
+	product[1] = a[0]*b[1] + a[1]*b[4] + a[2]*b[7];
+	product[2] = a[0]*b[2] + a[1]*b[5] + a[2]*b[8];
+
+	product[3] = a[3]*b[0] + a[4]*b[3] + a[5]*b[6];
+	product[4] = a[3]*b[1] + a[4]*b[4] + a[5]*b[7];
+	product[5] = a[3]*b[2] + a[4]*b[5] + a[5]*b[8];
+
+	product[6] = a[6]*b[0] + a[7]*b[3] + a[8]*b[6];
+	product[7] = a[6]*b[1] + a[7]*b[4] + a[8]*b[7];
+	product[8] = a[6]*b[2] + a[7]*b[5] + a[8]*b[8];
+
+	memcpy(mat, product, sizeof(product));
+}
+
+void wlr_matrix_translate(float mat[static 9], float x, float y) {
+	float translate[9] = {
+		1.0f, 0.0f, x,
+		0.0f, 1.0f, y,
+		0.0f, 0.0f, 1.0f,
+	};
+	wlr_matrix_multiply(mat, mat, translate);
+}
+
+void wlr_matrix_scale(float mat[static 9], float x, float y) {
+	float scale[9] = {
+		x,    0.0f, 0.0f,
+		0.0f, y,    0.0f,
+		0.0f, 0.0f, 1.0f,
+	};
+	wlr_matrix_multiply(mat, mat, scale);
+}
+
+void wlr_matrix_rotate(float mat[static 9], float rad) {
+	float rotate[9] = {
+		cos(rad), -sin(rad), 0.0f,
+		sin(rad),  cos(rad), 0.0f,
+		0.0f,      0.0f,     1.0f,
+	};
+	wlr_matrix_multiply(mat, mat, rotate);
+}
+
+static const float transforms[][9] = {
+	[WL_OUTPUT_TRANSFORM_NORMAL] = {
+		1.0f, 0.0f, 0.0f,
+		0.0f, 1.0f, 0.0f,
+		0.0f, 0.0f, 1.0f,
+	},
+	[WL_OUTPUT_TRANSFORM_90] = {
+		0.0f, -1.0f, 0.0f,
+		1.0f, 0.0f, 0.0f,
+		0.0f, 0.0f, 1.0f,
+	},
+	[WL_OUTPUT_TRANSFORM_180] = {
+		-1.0f, 0.0f, 0.0f,
+		0.0f, -1.0f, 0.0f,
+		0.0f, 0.0f, 1.0f,
+	},
+	[WL_OUTPUT_TRANSFORM_270] = {
+		0.0f, 1.0f, 0.0f,
+		-1.0f, 0.0f, 0.0f,
+		0.0f, 0.0f, 1.0f,
+	},
+	[WL_OUTPUT_TRANSFORM_FLIPPED] = {
+		-1.0f, 0.0f, 0.0f,
+		0.0f, 1.0f, 0.0f,
+		0.0f, 0.0f, 1.0f,
+	},
+	[WL_OUTPUT_TRANSFORM_FLIPPED_90] = {
+		0.0f, -1.0f, 0.0f,
+		-1.0f, 0.0f, 0.0f,
+		0.0f, 0.0f, 1.0f,
+	},
+	[WL_OUTPUT_TRANSFORM_FLIPPED_180] = {
+		1.0f, 0.0f, 0.0f,
+		0.0f, -1.0f, 0.0f,
+		0.0f, 0.0f, 1.0f,
+	},
+	[WL_OUTPUT_TRANSFORM_FLIPPED_270] = {
+		0.0f, 1.0f, 0.0f,
+		1.0f, 0.0f, 0.0f,
+		0.0f, 0.0f, 1.0f,
+	},
+};
+
+void wlr_matrix_transform(float mat[static 9],
+		enum wl_output_transform transform) {
+	wlr_matrix_multiply(mat, mat, transforms[transform]);
+}
+
+// Equivilent to glOrtho(0, width, 0, height, 1, -1) with the transform applied
+void wlr_matrix_projection(float mat[static 9], int width, int height,
+		enum wl_output_transform transform) {
+	memset(mat, 0, sizeof(*mat) * 9);
+
+	const float *t = transforms[transform];
+	float x = 2.0f / width;
+	float y = 2.0f / height;
+
+	// Rotation + reflection
+	mat[0] = x * t[0];
+	mat[1] = x * t[1];
+	mat[3] = y * -t[3];
+	mat[4] = y * -t[4];
+
+	// Translation
+	mat[2] = -copysign(1.0f, mat[0] + mat[1]);
+	mat[5] = -copysign(1.0f, mat[3] + mat[4]);
+
+	// Identity
+	mat[8] = 1.0f;
+}
+
+void wlr_matrix_project_box(float mat[static 9], const struct wlr_box *box,
+		enum wl_output_transform transform, float rotation,
+		const float projection[static 9]) {
+	int x = box->x;
+	int y = box->y;
+	int width = box->width;
+	int height = box->height;
+
+	wlr_matrix_identity(mat);
+	wlr_matrix_translate(mat, x, y);
+
+	if (rotation != 0) {
+		wlr_matrix_translate(mat, width/2, height/2);
+		wlr_matrix_rotate(mat, rotation);
+		wlr_matrix_translate(mat, -width/2, -height/2);
+	}
+
+	wlr_matrix_scale(mat, width, height);
+
+	if (transform != WL_OUTPUT_TRANSFORM_NORMAL) {
+		wlr_matrix_translate(mat, 0.5, 0.5);
+		wlr_matrix_transform(mat, transform);
+		wlr_matrix_translate(mat, -0.5, -0.5);
+	}
+
+	wlr_matrix_multiply(mat, projection, mat);
+}

types/wlr_output.c

@@ -7,7 +7,7 @@
 #include <wayland-server.h>
 #include <wlr/interfaces/wlr_output.h>
 #include <wlr/render.h>
-#include <wlr/render/matrix.h>
+#include <wlr/types/wlr_matrix.h>
 #include <wlr/types/wlr_box.h>
 #include <wlr/types/wlr_output.h>
 #include <wlr/types/wlr_surface.h>
@@ -139,8 +139,8 @@ void wlr_output_update_enabled(struct wlr_output *output, bool enabled) {
 }
 
 static void wlr_output_update_matrix(struct wlr_output *output) {
-	wlr_matrix_texture(output->transform_matrix, output->width, output->height,
-		output->transform);
+	wlr_matrix_projection(output->transform_matrix, output->width,
+		output->height, output->transform);
 }
 
 void wlr_output_enable(struct wlr_output *output, bool enable) {
@@ -368,25 +368,25 @@ static void output_fullscreen_surface_render(struct wlr_output *output,
 	assert(renderer);
 
 	if (!wlr_surface_has_buffer(surface)) {
-		wlr_renderer_clear(renderer, &(float[]){0, 0, 0, 0});
+		wlr_renderer_clear(renderer, (float[]){0, 0, 0, 0});
 		return;
 	}
 
 	struct wlr_box box;
 	output_fullscreen_surface_get_box(output, surface, &box);
 
-	float matrix[16];
+	float matrix[9];
 	enum wl_output_transform transform =
 		wlr_output_transform_invert(surface->current->transform);
-	wlr_matrix_project_box(&matrix, &box, transform, 0,
-		&output->transform_matrix);
+	wlr_matrix_project_box(matrix, &box, transform, 0,
+		output->transform_matrix);
 
 	int nrects;
 	pixman_box32_t *rects = pixman_region32_rectangles(damage, &nrects);
 	for (int i = 0; i < nrects; ++i) {
 		output_scissor(output, &rects[i]);
-		wlr_renderer_clear(renderer, &(float[]){0, 0, 0, 0});
-		wlr_render_with_matrix(surface->renderer, surface->texture, &matrix, 1.0f);
+		wlr_renderer_clear(renderer, (float[]){0, 0, 0, 0});
+		wlr_render_texture_with_matrix(surface->renderer, surface->texture, matrix, 1.0f);
 	}
 	wlr_renderer_scissor(renderer, NULL);
 
@@ -435,15 +435,15 @@ static void output_cursor_render(struct wlr_output_cursor *cursor,
 		goto surface_damage_finish;
 	}
 
-	float matrix[16];
-	wlr_matrix_project_box(&matrix, &box, WL_OUTPUT_TRANSFORM_NORMAL, 0,
-		&cursor->output->transform_matrix);
+	float matrix[9];
+	wlr_matrix_project_box(matrix, &box, WL_OUTPUT_TRANSFORM_NORMAL, 0,
+		cursor->output->transform_matrix);
 
 	int nrects;
 	pixman_box32_t *rects = pixman_region32_rectangles(&surface_damage, &nrects);
 	for (int i = 0; i < nrects; ++i) {
 		output_scissor(cursor->output, &rects[i]);
-		wlr_render_with_matrix(renderer, texture, &matrix, 1.0f);
+		wlr_render_texture_with_matrix(renderer, texture, matrix, 1.0f);
 	}
 	wlr_renderer_scissor(renderer, NULL);
 

types/wlr_surface.c

@@ -3,7 +3,7 @@
 #include <wayland-server.h>
 #include <wlr/render/egl.h>
 #include <wlr/render/interface.h>
-#include <wlr/render/matrix.h>
+#include <wlr/types/wlr_matrix.h>
 #include <wlr/types/wlr_region.h>
 #include <wlr/types/wlr_surface.h>
 #include <wlr/util/log.h>
@@ -628,22 +628,6 @@ struct wlr_surface *wlr_surface_create(struct wl_resource *res,
 	return surface;
 }
 
-void wlr_surface_get_matrix(struct wlr_surface *surface,
-		float (*matrix)[16],
-		const float (*projection)[16],
-		const float (*transform)[16]) {
-	int width = surface->texture->width;
-	int height = surface->texture->height;
-	float scale[16];
-	wlr_matrix_identity(matrix);
-	if (transform) {
-		wlr_matrix_mul(matrix, transform, matrix);
-	}
-	wlr_matrix_scale(&scale, width, height, 1);
-	wlr_matrix_mul(matrix, &scale, matrix);
-	wlr_matrix_mul(projection, matrix, matrix);
-}
-
 bool wlr_surface_has_buffer(struct wlr_surface *surface) {
 	return surface->texture && surface->texture->valid;
 }