From 27803c6859d152affc9dfcc59814a353cb6f5860 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Kristian=20H=C3=B8gsberg?= Date: Sun, 6 Jun 2010 22:23:21 -0400 Subject: [PATCH] Port compositor to GLES2 --- compositor.c | 293 +++++++++++++++++++++++++++++++++++------------------------ 1 file changed, 176 insertions(+), 117 deletions(-) diff --git a/compositor.c b/compositor.c index aeea336..e73c4de 100644 --- a/compositor.c +++ b/compositor.c @@ -39,7 +39,8 @@ #define GL_GLEXT_PROTOTYPES #define EGL_EGLEXT_PROTOTYPES -#include +#include +#include #include #include @@ -51,7 +52,7 @@ #define ARRAY_LENGTH(a) (sizeof (a) / sizeof (a)[0]) struct wlsc_matrix { - GLdouble d[16]; + GLfloat d[16]; }; struct wl_visual { @@ -71,6 +72,7 @@ struct wlsc_output { struct wl_list link; struct wlsc_compositor *compositor; struct wlsc_surface *background; + struct wlsc_matrix matrix; int32_t x, y, width, height; drmModeModeInfo mode; @@ -106,7 +108,8 @@ struct wlsc_compositor { EGLDisplay display; EGLContext context; int drm_fd; - GLuint fbo; + GLuint fbo, vbo; + GLuint proj_uniform, tex_uniform; struct wl_display *wl_display; struct wl_list output_list; @@ -143,7 +146,7 @@ struct wlsc_compositor { #define MODIFIER_ALT (1 << 9) struct wlsc_vector { - GLdouble x, y, z; + GLfloat f[4]; }; struct wlsc_surface { @@ -152,10 +155,10 @@ struct wlsc_surface { struct wl_visual *visual; GLuint texture; EGLImageKHR image; - struct wl_map map; int width, height; struct wl_list link; struct wlsc_matrix matrix; + struct wlsc_matrix matrix_inv; }; static const char *option_background = "background.jpg"; @@ -198,7 +201,6 @@ screenshooter_shoot(struct wl_client *client, struct screenshooter *shooter) continue; } - glReadBuffer(GL_FRONT); glPixelStorei(GL_PACK_ALIGNMENT, 1); glReadPixels(0, 0, output->width, output->height, GL_RGBA, GL_UNSIGNED_BYTE, data); @@ -262,7 +264,7 @@ static void wlsc_matrix_multiply(struct wlsc_matrix *m, const struct wlsc_matrix *n) { struct wlsc_matrix tmp; - const GLdouble *row, *column; + const GLfloat *row, *column; div_t d; int i, j; @@ -278,9 +280,9 @@ wlsc_matrix_multiply(struct wlsc_matrix *m, const struct wlsc_matrix *n) } static void -wlsc_matrix_translate(struct wlsc_matrix *matrix, GLdouble x, GLdouble y, GLdouble z) +wlsc_matrix_translate(struct wlsc_matrix *matrix, GLfloat x, GLfloat y, GLfloat z) { - struct wlsc_matrix translate = { + struct wlsc_matrix translate = { { 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, x, y, z, 1 } }; @@ -288,7 +290,7 @@ wlsc_matrix_translate(struct wlsc_matrix *matrix, GLdouble x, GLdouble y, GLdoub } static void -wlsc_matrix_scale(struct wlsc_matrix *matrix, GLdouble x, GLdouble y, GLdouble z) +wlsc_matrix_scale(struct wlsc_matrix *matrix, GLfloat x, GLfloat y, GLfloat z) { struct wlsc_matrix scale = { { x, 0, 0, 0, 0, y, 0, 0, 0, 0, z, 0, 0, 0, 0, 1 } @@ -299,10 +301,10 @@ wlsc_matrix_scale(struct wlsc_matrix *matrix, GLdouble x, GLdouble y, GLdouble z static void wlsc_matrix_rotate(struct wlsc_matrix *matrix, - GLdouble angle, GLdouble x, GLdouble y, GLdouble z) + GLfloat angle, GLfloat x, GLfloat y, GLfloat z) { - GLdouble c = cos(angle); - GLdouble s = sin(angle); + GLfloat c = cos(angle); + GLfloat s = sin(angle); struct wlsc_matrix rotate = { { x * x * (1 - c) + c, y * x * (1 - c) + z * s, x * z * (1 - c) - y * s, 0, x * y * (1 - c) - z * s, y * y * (1 - c) + c, y * z * (1 - c) + x * s, 0, @@ -314,18 +316,34 @@ wlsc_matrix_rotate(struct wlsc_matrix *matrix, } static void +wlsc_matrix_transform(struct wlsc_matrix *matrix, struct wlsc_vector *v) +{ + int i, j; + GLfloat t; + + for (i = 0; i < 4; i++) { + t = 0; + for (j = 0; j < 4; j++) + t += v->f[j] * matrix->d[i + j * 4]; + v->f[i] = t; + } +} + +static void wlsc_surface_init(struct wlsc_surface *surface, struct wlsc_compositor *compositor, struct wl_visual *visual, int32_t x, int32_t y, int32_t width, int32_t height) { glGenTextures(1, &surface->texture); surface->compositor = compositor; - surface->map.x = x; - surface->map.y = y; - surface->map.width = width; - surface->map.height = height; surface->visual = visual; wlsc_matrix_init(&surface->matrix); + wlsc_matrix_scale(&surface->matrix, width, height, 1); + wlsc_matrix_translate(&surface->matrix, x, y, 0); + + wlsc_matrix_init(&surface->matrix_inv); + wlsc_matrix_translate(&surface->matrix_inv, -x, -y, 0); + wlsc_matrix_scale(&surface->matrix_inv, 1.0 / width, 1.0 / height, 1); } static struct wlsc_surface * @@ -347,12 +365,12 @@ wlsc_surface_create_from_cairo_surface(struct wlsc_compositor *ec, wlsc_surface_init(es, ec, &ec->premultiplied_argb_visual, x, y, width, height); glBindTexture(GL_TEXTURE_2D, es->texture); - glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_R, GL_REPEAT); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, - GL_BGRA, GL_UNSIGNED_BYTE, data); + GL_RGBA, GL_UNSIGNED_BYTE, data); return es; } @@ -456,8 +474,8 @@ background_create(struct wlsc_output *output, const char *filename) output->x, output->y, output->width, output->height); glBindTexture(GL_TEXTURE_2D, background->texture); - glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_R, GL_REPEAT); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); @@ -474,28 +492,15 @@ background_create(struct wlsc_output *output, const char *filename) } static void -wlsc_surface_draw(struct wlsc_surface *es) +wlsc_surface_draw(struct wlsc_surface *es, struct wlsc_output *output) { struct wlsc_compositor *ec = es->compositor; - GLint vertices[12]; - GLint tex_coords[12] = { 0, 0, 0, 1, 1, 0, 1, 1 }; - GLuint indices[4] = { 0, 1, 2, 3 }; - - vertices[0] = es->map.x; - vertices[1] = es->map.y; - vertices[2] = 0; - - vertices[3] = es->map.x; - vertices[4] = es->map.y + es->map.height; - vertices[5] = 0; - - vertices[6] = es->map.x + es->map.width; - vertices[7] = es->map.y; - vertices[8] = 0; + struct wlsc_matrix tmp; - vertices[9] = es->map.x + es->map.width; - vertices[10] = es->map.y + es->map.height; - vertices[11] = 0; + tmp = es->matrix; + wlsc_matrix_multiply(&tmp, &output->matrix); + glUniformMatrix4fv(ec->proj_uniform, 1, GL_FALSE, tmp.d); + glUniform1i(ec->tex_uniform, 0); if (es->visual == &ec->argb_visual) { glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); @@ -507,16 +512,16 @@ wlsc_surface_draw(struct wlsc_surface *es) glDisable(GL_BLEND); } - glPushMatrix(); - //glMultMatrixd(es->matrix.d); glBindTexture(GL_TEXTURE_2D, es->texture); glEnable(GL_TEXTURE_2D); - glEnableClientState(GL_VERTEX_ARRAY); - glEnableClientState(GL_TEXTURE_COORD_ARRAY); - glVertexPointer(3, GL_INT, 0, vertices); - glTexCoordPointer(2, GL_INT, 0, tex_coords); - glDrawElements(GL_TRIANGLE_STRIP, 4, GL_UNSIGNED_INT, indices); - glPopMatrix(); + glBindBuffer(GL_ARRAY_BUFFER, ec->vbo); + glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, + 5 * sizeof(GLfloat), NULL); + glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, + 5 * sizeof(GLfloat), (GLfloat *) 0 + 3); + glEnableVertexAttribArray(0); + glEnableVertexAttribArray(1); + glDrawArrays(GL_TRIANGLE_STRIP, 0, 4); } static void @@ -538,30 +543,6 @@ wlsc_surface_lower(struct wlsc_surface *surface) } static void -wlsc_vector_add(struct wlsc_vector *v1, struct wlsc_vector *v2) -{ - v1->x += v2->x; - v1->y += v2->y; - v1->z += v2->z; -} - -static void -wlsc_vector_subtract(struct wlsc_vector *v1, struct wlsc_vector *v2) -{ - v1->x -= v2->x; - v1->y -= v2->y; - v1->z -= v2->z; -} - -static void -wlsc_vector_scalar(struct wlsc_vector *v1, GLdouble s) -{ - v1->x *= s; - v1->y *= s; - v1->z *= s; -} - -static void page_flip_handler(int fd, unsigned int frame, unsigned int sec, unsigned int usec, void *data) { @@ -586,35 +567,25 @@ repaint_output(struct wlsc_output *output) struct wlsc_compositor *ec = output->compositor; struct wlsc_surface *es; struct wlsc_input_device *eid; - double s = 3000; glViewport(0, 0, output->width, output->height); - glMatrixMode(GL_PROJECTION); - glLoadIdentity(); - glFrustum(-output->width / s, output->width / s, - -output->height / s, output->height / s, 1, 2 * s); - glMatrixMode(GL_MODELVIEW); - glLoadIdentity(); - glClearColor(0, 0, 0, 1); - - glTranslatef(-output->width / 2, -output->height / 2, -s / 2); if (output->background) - wlsc_surface_draw(output->background); + wlsc_surface_draw(output->background, output); else glClear(GL_COLOR_BUFFER_BIT); wl_list_for_each(es, &ec->surface_list, link) - wlsc_surface_draw(es); + wlsc_surface_draw(es, output); wl_list_for_each(eid, &ec->input_device_list, link) - wlsc_surface_draw(eid->sprite); + wlsc_surface_draw(eid->sprite, output); output->current ^= 1; - glFramebufferRenderbuffer(GL_DRAW_FRAMEBUFFER_EXT, - GL_COLOR_ATTACHMENT0_EXT, - GL_RENDERBUFFER_EXT, + glFramebufferRenderbuffer(GL_FRAMEBUFFER, + GL_COLOR_ATTACHMENT0, + GL_RENDERBUFFER, output->rbo[output->current]); drmModePageFlip(ec->drm_fd, output->crtc_id, output->fb_id[output->current ^ 1], @@ -695,8 +666,8 @@ surface_attach(struct wl_client *client, /* FIXME: Smack client with an exception event */; glBindTexture(GL_TEXTURE_2D, es->texture); - glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_R, GL_REPEAT); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); @@ -722,10 +693,8 @@ surface_map(struct wl_client *client, { struct wlsc_surface *es = (struct wlsc_surface *) surface; - es->map.x = x; - es->map.y = y; - es->map.width = width; - es->map.height = height; + wlsc_matrix_translate(&es->matrix, x, y, 0); + wlsc_matrix_scale(&es->matrix, width, height, 1); } static void @@ -791,9 +760,11 @@ static void wlsc_surface_transform(struct wlsc_surface *surface, int32_t x, int32_t y, int32_t *sx, int32_t *sy) { - /* Transform to surface coordinates. */ - *sx = (x - surface->map.x) * surface->width / surface->map.width; - *sy = (y - surface->map.y) * surface->height / surface->map.height; + struct wlsc_vector v = { { x, y, 0, 1 } }; + + wlsc_matrix_transform(&surface->matrix_inv, &v); + *sx = v.f[0]; + *sy = v.f[1]; } static void @@ -850,14 +821,12 @@ pick_surface(struct wlsc_input_device *device, int32_t *sx, int32_t *sy) return device->grab_surface; } - wl_list_for_each(es, &ec->surface_list, link) - if (es->map.x <= device->x && - device->x < es->map.x + es->map.width && - es->map.y <= device->y && - device->y < es->map.y + es->map.height) { - wlsc_surface_transform(es, device->x, device->y, sx, sy); + wl_list_for_each(es, &ec->surface_list, link) { + wlsc_surface_transform(es, device->x, device->y, sx, sy); + if (0 <= *sx && *sx < es->width && + 0 <= *sy && *sy < es->height) return es; - } + } return NULL; } @@ -895,8 +864,10 @@ notify_motion(struct wlsc_input_device *device, int x, int y) wl_surface_post_event(&es->base, &device->base, WL_INPUT_MOTION, x, y, sx, sy); - device->sprite->map.x = x - hotspot_x; - device->sprite->map.y = y - hotspot_y; + wlsc_matrix_init(&device->sprite->matrix); + wlsc_matrix_scale(&device->sprite->matrix, 64, 64, 1); + wlsc_matrix_translate(&device->sprite->matrix, + x - hotspot_x, y - hotspot_y, 0); wlsc_compositor_schedule_repaint(device->ec); } @@ -1071,6 +1042,91 @@ on_drm_input(int fd, uint32_t mask, void *data) drmHandleEvent(fd, &evctx); } +static const char vertex_shader[] = + "uniform mat4 proj;\n" + "attribute vec4 position;\n" + "attribute vec2 texcoord;\n" + "varying vec2 v_texcoord;\n" + "void main()\n" + "{\n" + " gl_Position = proj * position;\n" + " v_texcoord = texcoord;\n" + "}\n"; + +static const char fragment_shader[] = + /* "precision mediump float;\n" */ + "varying vec2 v_texcoord;\n" + "uniform sampler2D tex;\n" + "void main()\n" + "{\n" + " gl_FragColor = texture2D(tex, v_texcoord)\n;" + "}\n"; + +static void +init_shaders(struct wlsc_compositor *ec) +{ + GLuint v, f, program; + const char *p; + char msg[512]; + GLfloat vertices[4 * 5]; + + p = vertex_shader; + v = glCreateShader(GL_VERTEX_SHADER); + glShaderSource(v, 1, &p, NULL); + glCompileShader(v); + glGetShaderInfoLog(v, sizeof msg, NULL, msg); + printf("vertex shader info: %s\n", msg); + + p = fragment_shader; + f = glCreateShader(GL_FRAGMENT_SHADER); + glShaderSource(f, 1, &p, NULL); + glCompileShader(f); + glGetShaderInfoLog(f, sizeof msg, NULL, msg); + printf("fragment shader info: %s\n", msg); + + program = glCreateProgram(); + glAttachShader(program, v); + glAttachShader(program, f); + glBindAttribLocation(program, 0, "position"); + glBindAttribLocation(program, 1, "texcoord"); + + glLinkProgram(program); + glGetProgramInfoLog(program, sizeof msg, NULL, msg); + printf("info: %s\n", msg); + + glUseProgram(program); + ec->proj_uniform = glGetUniformLocation(program, "proj"); + ec->tex_uniform = glGetUniformLocation(program, "tex"); + + vertices[ 0] = 0.0; + vertices[ 1] = 0.0; + vertices[ 2] = 0.0; + vertices[ 3] = 0.0; + vertices[ 4] = 0.0; + + vertices[ 5] = 0.0; + vertices[ 6] = 1.0; + vertices[ 7] = 0.0; + vertices[ 8] = 0.0; + vertices[ 9] = 1.0; + + vertices[10] = 1.0; + vertices[11] = 0.0; + vertices[12] = 0.0; + vertices[13] = 1.0; + vertices[14] = 0.0; + + vertices[15] = 1.0; + vertices[16] = 1.0; + vertices[17] = 0.0; + vertices[18] = 1.0; + vertices[19] = 1.0; + + glGenBuffers(1, &ec->vbo); + glBindBuffer(GL_ARRAY_BUFFER, ec->vbo); + glBufferData(GL_ARRAY_BUFFER, sizeof vertices, vertices, GL_STATIC_DRAW); +} + static int init_egl(struct wlsc_compositor *ec, struct udev_device *device) { @@ -1132,7 +1188,9 @@ init_egl(struct wlsc_compositor *ec, struct udev_device *device) } glGenFramebuffers(1, &ec->fbo); - glBindFramebuffer(GL_FRAMEBUFFER_EXT, ec->fbo); + glBindFramebuffer(GL_FRAMEBUFFER, ec->fbo); + glActiveTexture(GL_TEXTURE0); + init_shaders(ec); loop = wl_display_get_event_loop(ec->wl_display); ec->drm_source = @@ -1201,18 +1259,19 @@ create_output_for_connector(struct wlsc_compositor *ec, output->y = 0; output->width = mode->hdisplay; output->height = mode->vdisplay; + wlsc_matrix_init(&output->matrix); - printf("using crtc %d, connector %d and encoder %d, mode %s\n", - output->crtc_id, - output->connector_id, - encoder->encoder_id, - mode->name); + wlsc_matrix_translate(&output->matrix, + -output->x - output->width / 2.0, + -output->y - output->height / 2.0, 0); + wlsc_matrix_scale(&output->matrix, + 2.0 / output->width, 2.0 / output->height, 1); drmModeFreeEncoder(encoder); glGenRenderbuffers(2, output->rbo); for (i = 0; i < 2; i++) { - glBindRenderbuffer(GL_RENDERBUFFER_EXT, output->rbo[i]); + glBindRenderbuffer(GL_RENDERBUFFER, output->rbo[i]); attribs[1] = output->width; attribs[3] = output->height; @@ -1229,9 +1288,9 @@ create_output_for_connector(struct wlsc_compositor *ec, } output->current = 0; - glFramebufferRenderbuffer(GL_DRAW_FRAMEBUFFER_EXT, - GL_COLOR_ATTACHMENT0_EXT, - GL_RENDERBUFFER_EXT, + glFramebufferRenderbuffer(GL_FRAMEBUFFER, + GL_COLOR_ATTACHMENT0, + GL_RENDERBUFFER, output->rbo[output->current]); ret = drmModeSetCrtc(ec->drm_fd, output->crtc_id, output->fb_id[output->current ^ 1], 0, 0, -- 2.7.4