[PATCH weston 2/8] gl-renderer: Add flexible shader generation.
John Kåre Alsaker
john.kare.alsaker at gmail.com
Thu Feb 21 10:19:28 PST 2013
This add a more flexible way of generating shaders. It generates all valid
combinations of different input, conversion and output pipelines, which
can easily be extended with more if desired.
---
src/gl-internal.h | 65 +++--
src/gl-renderer.c | 71 +++---
src/gl-shaders.c | 700 +++++++++++++++++++++++++++++++++++++++---------------
3 files changed, 594 insertions(+), 242 deletions(-)
diff --git a/src/gl-internal.h b/src/gl-internal.h
index 2e55313..2f61299 100644
--- a/src/gl-internal.h
+++ b/src/gl-internal.h
@@ -39,13 +39,41 @@
#include <EGL/eglext.h>
#include "weston-egl-ext.h"
+#define MAX_PLANES 3
+
+enum gl_shader_attribute {
+ ATTRIBUTE_INPUT,
+ ATTRIBUTE_OUTPUT,
+ ATTRIBUTE_CONVERSION,
+ ATTRIBUTE_COUNT
+};
+
+enum gl_conversion_attribute {
+ CONVERSION_NONE,
+ CONVERSION_COUNT
+};
+
+enum gl_output_attribute {
+ OUTPUT_BLEND,
+ OUTPUT_COUNT
+};
+
+enum gl_input_attribute {
+ INPUT_RGBX,
+ INPUT_RGBA,
+ INPUT_EGL_EXTERNAL,
+ INPUT_Y_UV,
+ INPUT_Y_U_V,
+ INPUT_Y_XUXV,
+ INPUT_SOLID,
+ INPUT_COUNT
+};
+
struct gl_shader {
GLuint program;
- GLuint vertex_shader, fragment_shader;
- GLint proj_uniform;
- GLint tex_uniforms[3];
- GLint alpha_uniform;
+ GLint projection_uniform;
GLint color_uniform;
+ GLint alpha_uniform;
};
struct gl_output_state {
@@ -56,13 +84,13 @@ struct gl_output_state {
struct gl_surface_state {
GLfloat color[4];
- struct gl_shader *shader;
+ enum gl_input_attribute input;
- GLuint textures[3];
+ GLuint textures[MAX_PLANES];
int num_textures;
pixman_region32_t texture_damage;
- EGLImageKHR images[3];
+ EGLImageKHR images[MAX_PLANES];
GLenum target;
int num_images;
@@ -97,15 +125,11 @@ struct gl_renderer {
int has_egl_image_external;
- struct gl_shader texture_shader_rgba;
- struct gl_shader texture_shader_rgbx;
- struct gl_shader texture_shader_egl_external;
- struct gl_shader texture_shader_y_uv;
- struct gl_shader texture_shader_y_u_v;
- struct gl_shader texture_shader_y_xuxv;
- struct gl_shader invert_color_shader;
- struct gl_shader solid_shader;
+ struct gl_shader *solid_shader;
struct gl_shader *current_shader;
+
+ struct gl_shader **shaders;
+ size_t shader_count;
};
static inline struct gl_output_state *
@@ -133,11 +157,20 @@ void
gl_destroy_shaders(struct gl_renderer *gr);
void
+gl_shader_set_output(struct gl_shader *shader,
+ struct weston_output *output);
+
+void
gl_use_shader(struct gl_renderer *gr,
struct gl_shader *shader);
+struct gl_shader *
+gl_select_shader(struct gl_renderer *gr,
+ enum gl_input_attribute input,
+ enum gl_output_attribute output);
+
void
-gl_shader_uniforms(struct gl_shader *shader,
+gl_shader_setup(struct gl_shader *shader,
struct weston_surface *surface,
struct weston_output *output);
diff --git a/src/gl-renderer.c b/src/gl-renderer.c
index 495d5db..6e0bfa5 100644
--- a/src/gl-renderer.c
+++ b/src/gl-renderer.c
@@ -533,8 +533,8 @@ triangle_fan_debug(struct weston_surface *surface, int first, int count)
*index++ = first + i;
}
- glUseProgram(gr->solid_shader.program);
- glUniform4fv(gr->solid_shader.color_uniform, 1,
+ glUseProgram(gr->solid_shader->program);
+ glUniform4fv(gr->solid_shader->color_uniform, 1,
color[color_idx++ % ARRAY_LENGTH(color)]);
glDrawElements(GL_LINES, nelems, GL_UNSIGNED_SHORT, buffer);
glUseProgram(gr->current_shader->program);
@@ -616,6 +616,7 @@ draw_surface(struct weston_surface *es, struct weston_output *output,
struct gl_renderer *gr = get_renderer(ec);
struct gl_surface_state *gs = get_surface_state(es);
struct gl_output_state *go = get_output_state(output);
+ struct gl_shader *shader;
/* repaint bounding region in global coordinates: */
pixman_region32_t repaint;
/* non-opaque region in surface coordinates: */
@@ -638,12 +639,14 @@ draw_surface(struct weston_surface *es, struct weston_output *output,
glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
if (ec->fan_debug) {
- gl_use_shader(gr, &gr->solid_shader);
- gl_shader_uniforms(&gr->solid_shader, es, output);
+ gl_use_shader(gr, gr->solid_shader);
+ gl_shader_setup(gr->solid_shader, es, output);
}
- gl_use_shader(gr, gs->shader);
- gl_shader_uniforms(gs->shader, es, output);
+ shader = gl_select_shader(gr, gs->input, OUTPUT_BLEND);
+
+ gl_use_shader(gr, shader);
+ gl_shader_setup(shader, es, output);
if (es->transform.enabled || output->zoom.active)
filter = GL_LINEAR;
@@ -663,14 +666,16 @@ draw_surface(struct weston_surface *es, struct weston_output *output,
pixman_region32_subtract(&surface_blend, &surface_blend, &es->opaque);
if (pixman_region32_not_empty(&es->opaque)) {
- if (gs->shader == &gr->texture_shader_rgba) {
+ if (gs->input == INPUT_RGBA) {
/* Special case for RGBA textures with possibly
* bad data in alpha channel: use the shader
* that forces texture alpha = 1.0.
* Xwayland surfaces need this.
*/
- gl_use_shader(gr, &gr->texture_shader_rgbx);
- gl_shader_uniforms(&gr->texture_shader_rgbx, es, output);
+
+ struct gl_shader *rgbx_shader = gl_select_shader(gr, INPUT_RGBX, OUTPUT_BLEND);
+ gl_use_shader(gr, rgbx_shader);
+ gl_shader_setup(rgbx_shader, es, output);
}
if (es->alpha < 1.0)
@@ -682,7 +687,7 @@ draw_surface(struct weston_surface *es, struct weston_output *output,
}
if (pixman_region32_not_empty(&surface_blend)) {
- gl_use_shader(gr, gs->shader);
+ gl_use_shader(gr, shader);
glEnable(GL_BLEND);
repaint_region(es, &repaint, &surface_blend);
}
@@ -786,17 +791,17 @@ draw_border(struct weston_output *output)
{
struct weston_compositor *ec = output->compositor;
struct gl_renderer *gr = get_renderer(ec);
- struct gl_shader *shader = &gr->texture_shader_rgba;
+ struct gl_shader *shader;
GLfloat *v;
int n;
+ shader = gl_select_shader(gr, INPUT_RGBA, OUTPUT_BLEND);
+
glDisable(GL_BLEND);
gl_use_shader(gr, shader);
- glUniformMatrix4fv(shader->proj_uniform,
- 1, GL_FALSE, output->matrix.d);
+ gl_shader_set_output(shader, output);
- glUniform1i(shader->tex_uniforms[0], 0);
glUniform1f(shader->alpha_uniform, 1);
n = texture_border(output);
@@ -1029,9 +1034,9 @@ gl_renderer_attach(struct weston_surface *es, struct wl_buffer *buffer)
gs->pitch, buffer->height, 0,
GL_BGRA_EXT, GL_UNSIGNED_BYTE, NULL);
if (wl_shm_buffer_get_format(buffer) == WL_SHM_FORMAT_XRGB8888)
- gs->shader = &gr->texture_shader_rgbx;
+ gs->input = INPUT_RGBX;
else
- gs->shader = &gr->texture_shader_rgba;
+ gs->input = INPUT_RGBA;
} else if (gr->query_buffer(gr->egl_display, buffer,
EGL_TEXTURE_FORMAT, &format)) {
for (i = 0; i < gs->num_images; i++)
@@ -1040,30 +1045,35 @@ gl_renderer_attach(struct weston_surface *es, struct wl_buffer *buffer)
gs->target = GL_TEXTURE_2D;
switch (format) {
case EGL_TEXTURE_RGB:
- case EGL_TEXTURE_RGBA:
default:
num_planes = 1;
- gs->shader = &gr->texture_shader_rgba;
+ gs->input = INPUT_RGBX;
+ break;
+ case EGL_TEXTURE_RGBA:
+ num_planes = 1;
+ gs->input = INPUT_RGBA;
break;
case EGL_TEXTURE_EXTERNAL_WL:
num_planes = 1;
gs->target = GL_TEXTURE_EXTERNAL_OES;
- gs->shader = &gr->texture_shader_egl_external;
+ gs->input = INPUT_EGL_EXTERNAL;
break;
case EGL_TEXTURE_Y_UV_WL:
num_planes = 2;
- gs->shader = &gr->texture_shader_y_uv;
+ gs->input = INPUT_Y_UV;
break;
case EGL_TEXTURE_Y_U_V_WL:
num_planes = 3;
- gs->shader = &gr->texture_shader_y_u_v;
+ gs->input = INPUT_Y_U_V;
break;
case EGL_TEXTURE_Y_XUXV_WL:
num_planes = 2;
- gs->shader = &gr->texture_shader_y_xuxv;
+ gs->input = INPUT_Y_XUXV;
break;
}
+ assert(num_planes <= MAX_PLANES);
+
ensure_textures(gs, num_planes);
for (i = 0; i < num_planes; i++) {
attribs[0] = EGL_WAYLAND_PLANE_WL;
@@ -1097,14 +1107,13 @@ gl_renderer_surface_set_color(struct weston_surface *surface,
float red, float green, float blue, float alpha)
{
struct gl_surface_state *gs = get_surface_state(surface);
- struct gl_renderer *gr = get_renderer(surface->compositor);
gs->color[0] = red;
gs->color[1] = green;
gs->color[2] = blue;
gs->color[3] = alpha;
- gs->shader = &gr->solid_shader;
+ gs->input = INPUT_SOLID;
}
static int
@@ -1338,6 +1347,8 @@ gl_renderer_destroy(struct weston_compositor *ec)
if (gr->has_bind_display)
gr->unbind_display(gr->egl_display, ec->wl_display);
+ gl_destroy_shaders(gr);
+
/* Work around crash in egl_dri2.c's dri2_make_current() - when does this apply? */
eglMakeCurrent(gr->egl_display,
EGL_NO_SURFACE, EGL_NO_SURFACE,
@@ -1345,6 +1356,9 @@ gl_renderer_destroy(struct weston_compositor *ec)
eglTerminate(gr->egl_display);
eglReleaseThread();
+
+ free(ec->renderer);
+ ec->renderer = NULL;
}
static int
@@ -1470,19 +1484,12 @@ fragment_debug_binding(struct wl_seat *seat, uint32_t time, uint32_t key,
{
struct weston_compositor *ec = data;
struct gl_renderer *gr = get_renderer(ec);
- struct weston_output *output;
gr->fragment_shader_debug ^= 1;
- gl_destroy_shaders(gr);
gl_init_shaders(gr);
- /* Force use_shader() to call glUseProgram(), since we need to use
- * the recompiled version of the shader. */
- gr->current_shader = NULL;
-
- wl_list_for_each(output, &ec->output_list, link)
- weston_output_damage(output);
+ weston_compositor_damage_all(ec);
}
static int
diff --git a/src/gl-shaders.c b/src/gl-shaders.c
index 35275ca..ccbe4c6 100644
--- a/src/gl-shaders.c
+++ b/src/gl-shaders.c
@@ -23,155 +23,321 @@
#include "gl-internal.h"
-void
-gl_use_shader(struct gl_renderer *gr,
- struct gl_shader *shader)
+#define STRINGIFY(expr) #expr
+#define STRINGIFY_VALUE(expr) STRINGIFY(expr)
+
+static const size_t attribute_counts[ATTRIBUTE_COUNT] = {
+ INPUT_COUNT,
+ OUTPUT_COUNT,
+ CONVERSION_COUNT
+};
+
+struct shader_builder;
+
+typedef int (*gl_shader_constructor_t)
+ (struct shader_builder *builder);
+typedef void (*gl_shader_setup_uniforms_t)(struct shader_builder *builder,
+ struct gl_shader *shader);
+
+struct gl_input_type_desc {
+ int transparent;
+ gl_shader_constructor_t constructor;
+ gl_shader_setup_uniforms_t setup_uniforms;
+};
+
+struct shader_string {
+ size_t length;
+ const char *str;
+};
+
+struct shader_string_list {
+ struct shader_builder *builder;
+ struct wl_array array;
+};
+
+struct shader_builder {
+ struct gl_renderer *renderer;
+ struct gl_input_type_desc *desc;
+ int error;
+ size_t attributes[ATTRIBUTE_COUNT];
+ struct shader_string_list directives, global, body;
+ size_t result_size;
+ struct wl_array result;
+};
+
+static void
+shader_string_list_init(struct shader_string_list *strings,
+ struct shader_builder *builder)
{
- if (gr->current_shader == shader)
+ strings->builder = builder;
+ wl_array_init(&strings->array);
+}
+
+static void
+shader_builder_init(struct shader_builder *builder)
+{
+ builder->error = 0;
+ builder->result_size = 1;
+ wl_array_init(&builder->result);
+ shader_string_list_init(&builder->directives, builder);
+ shader_string_list_init(&builder->global, builder);
+ shader_string_list_init(&builder->body, builder);
+}
+
+static void
+shader_builder_release(struct shader_builder *builder)
+{
+ wl_array_release(&builder->directives.array);
+ wl_array_release(&builder->global.array);
+ wl_array_release(&builder->body.array);
+}
+
+static void
+append_shader_string_list(char **result, struct shader_string_list *string)
+{
+ struct shader_string *str;
+
+ wl_array_for_each(str, &string->array) {
+ memcpy(*result, str->str, str->length);
+ *result += str->length;
+ }
+}
+
+static const char *
+shader_builder_get_string(struct shader_builder *builder)
+{
+ char *data;
+
+ if (builder->error)
+ return NULL;
+
+ data = wl_array_add(&builder->result, builder->result_size);
+
+ if (!data)
+ return NULL;
+
+ append_shader_string_list(&data, &builder->directives);
+ append_shader_string_list(&data, &builder->global);
+ append_shader_string_list(&data, &builder->body);
+
+ *data = 0;
+
+ return builder->result.data;
+}
+
+static void
+append(struct shader_string_list *list, const char *string)
+{
+ struct shader_string str;
+ struct shader_string *data;
+
+ if (!string) {
+ list->builder->error = 1;
return;
+ }
- glUseProgram(shader->program);
- gr->current_shader = shader;
+ str.str = string;
+ str.length = strlen(string);
+ list->builder->result_size += str.length;
+
+ if (str.length > list->builder->result_size)
+ list->builder->error = 3;
+
+ data = wl_array_add(&list->array, sizeof(str));
+ if (!data)
+ list->builder->error = 2;
+ else
+ *data = str;
}
-void
-gl_shader_uniforms(struct gl_shader *shader,
- struct weston_surface *surface,
- struct weston_output *output)
+static int
+shader_rgbx_constructor(struct shader_builder *sb)
+{
+ append(&sb->global, "uniform sampler2D texture;\n");
+ append(&sb->body,
+ "gl_FragColor.rgb = texture2D(texture, texture_coord).rgb;\n" \
+ "gl_FragColor.a = 1.0;\n");
+
+ return 1;
+}
+
+static int
+shader_rgba_constructor(struct shader_builder *sb)
+{
+ append(&sb->global, "uniform sampler2D texture;\n");
+ append(&sb->body,
+ "gl_FragColor = texture2D(texture, texture_coord);\n");
+
+
+ return 1;
+}
+
+static int
+shader_egl_external_constructor(struct shader_builder *sb)
+{
+ if (!sb->renderer->has_egl_image_external)
+ return 0;
+
+ append(&sb->directives,
+ "#extension GL_OES_EGL_image_external : require;\n");
+ append(&sb->global,
+ "uniform samplerExternalOES texture;\n");
+ append(&sb->body,
+ "gl_FragColor = texture2D(texture, texture_coord);\n");
+
+ return 1;
+}
+
+static void
+shader_texture_uniforms(struct shader_builder *sb,
+ struct gl_shader *shader)
+{
+ glUniform1i(glGetUniformLocation(shader->program, "texture"), 0);
+}
+
+static int
+shader_yuv_constructor(struct shader_builder *sb)
+{
+ const char *sample;
+
+ append(&sb->global,
+ "uniform sampler2D planes[" STRINGIFY_VALUE(MAX_PLANES) "];\n");
+
+ switch (sb->attributes[ATTRIBUTE_INPUT]) {
+ case INPUT_Y_UV:
+ sample = "vec3 yuv = vec3(" \
+ "texture2D(planes[0], texture_coord).x," \
+ "texture2D(planes[1], texture_coord).xy);\n";
+ break;
+ case INPUT_Y_U_V:
+ sample = "vec3 yuv = vec3(" \
+ "texture2D(planes[0], texture_coord).x," \
+ "texture2D(planes[1], texture_coord).x," \
+ "texture2D(planes[2], texture_coord).x);\n";
+ break;
+ case INPUT_Y_XUXV:
+ sample = "vec3 yuv = vec3(" \
+ "texture2D(planes[0], texture_coord).x," \
+ "texture2D(planes[1], texture_coord).yw);\n";
+ break;
+ default:
+ sample = NULL;
+ }
+
+ append(&sb->body, sample);
+ append(&sb->body,
+ "yuv = vec3(1.16438356 * (yuv.x - 0.0625), yuv.yz - 0.5);\n" \
+ "gl_FragColor.r = yuv.x + 1.59602678 * yuv.z;\n" \
+ "gl_FragColor.g = yuv.x - 0.39176229 * yuv.y - " \
+ "0.81296764 * yuv.z;\n" \
+ "gl_FragColor.b = yuv.x + 2.01723214 * yuv.y;\n" \
+ "gl_FragColor.a = 1.0;\n");
+
+ return 1;
+}
+
+static void
+shader_yuv_uniforms(struct shader_builder *sb, struct gl_shader *shader)
{
int i;
- struct gl_surface_state *gs = get_surface_state(surface);
+ GLint values[MAX_PLANES];
- glUniformMatrix4fv(shader->proj_uniform,
- 1, GL_FALSE, output->matrix.d);
- glUniform4fv(shader->color_uniform, 1, gs->color);
- glUniform1f(shader->alpha_uniform, surface->alpha);
+ for (i = 0; i < MAX_PLANES; i++)
+ values[i] = i;
- for (i = 0; i < gs->num_textures; i++)
- glUniform1i(shader->tex_uniforms[i], i);
+ glUniform1iv(glGetUniformLocation(shader->program, "planes"),
+ MAX_PLANES, values);
}
-static const char vertex_shader[] =
- "uniform mat4 proj;\n"
- "attribute vec2 position;\n"
- "attribute vec2 texcoord;\n"
- "varying vec2 v_texcoord;\n"
- "void main()\n"
- "{\n"
- " gl_Position = proj * vec4(position, 0.0, 1.0);\n"
- " v_texcoord = texcoord;\n"
- "}\n";
+static int
+shader_solid_constructor(struct shader_builder *sb)
+{
+ append(&sb->global, "uniform vec4 color;\n");
+ append(&sb->body, "gl_FragColor = color;\n");
-/* Declare common fragment shader uniforms */
-#define FRAGMENT_CONVERT_YUV \
- " y *= alpha;\n" \
- " u *= alpha;\n" \
- " v *= alpha;\n" \
- " gl_FragColor.r = y + 1.59602678 * v;\n" \
- " gl_FragColor.g = y - 0.39176229 * u - 0.81296764 * v;\n" \
- " gl_FragColor.b = y + 2.01723214 * u;\n" \
- " gl_FragColor.a = alpha;\n"
+ return 1;
+}
-static const char fragment_debug[] =
- " gl_FragColor = vec4(0.0, 0.3, 0.0, 0.2) + gl_FragColor * 0.8;\n";
+static void
+shader_solid_uniforms(struct shader_builder *sb, struct gl_shader *shader)
+{
+ shader->color_uniform = glGetUniformLocation(shader->program, "color");
+}
-static const char fragment_brace[] =
- "}\n";
+static struct gl_input_type_desc input_type_descs[INPUT_COUNT] = {
+ /* INPUT_RGBX */
+ {0, shader_rgbx_constructor, shader_texture_uniforms},
-static const char texture_fragment_shader_rgba[] =
- "precision mediump float;\n"
- "varying vec2 v_texcoord;\n"
- "uniform sampler2D tex;\n"
- "uniform float alpha;\n"
- "void main()\n"
- "{\n"
- " gl_FragColor = alpha * texture2D(tex, v_texcoord)\n;"
- ;
-
-static const char texture_fragment_shader_rgbx[] =
- "precision mediump float;\n"
- "varying vec2 v_texcoord;\n"
- "uniform sampler2D tex;\n"
- "uniform float alpha;\n"
- "void main()\n"
- "{\n"
- " gl_FragColor.rgb = alpha * texture2D(tex, v_texcoord).rgb\n;"
- " gl_FragColor.a = alpha;\n"
- ;
-
-static const char texture_fragment_shader_egl_external[] =
- "#extension GL_OES_EGL_image_external : require\n"
- "precision mediump float;\n"
- "varying vec2 v_texcoord;\n"
- "uniform samplerExternalOES tex;\n"
- "uniform float alpha;\n"
- "void main()\n"
- "{\n"
- " gl_FragColor = alpha * texture2D(tex, v_texcoord)\n;"
- ;
-
-static const char texture_fragment_shader_y_uv[] =
- "precision mediump float;\n"
- "uniform sampler2D tex;\n"
- "uniform sampler2D tex1;\n"
- "varying vec2 v_texcoord;\n"
- "uniform float alpha;\n"
- "void main() {\n"
- " float y = 1.16438356 * (texture2D(tex, v_texcoord).x - 0.0625);\n"
- " float u = texture2D(tex1, v_texcoord).r - 0.5;\n"
- " float v = texture2D(tex1, v_texcoord).g - 0.5;\n"
- FRAGMENT_CONVERT_YUV
- ;
-
-static const char texture_fragment_shader_y_u_v[] =
- "precision mediump float;\n"
- "uniform sampler2D tex;\n"
- "uniform sampler2D tex1;\n"
- "uniform sampler2D tex2;\n"
- "varying vec2 v_texcoord;\n"
- "uniform float alpha;\n"
- "void main() {\n"
- " float y = 1.16438356 * (texture2D(tex, v_texcoord).x - 0.0625);\n"
- " float u = texture2D(tex1, v_texcoord).x - 0.5;\n"
- " float v = texture2D(tex2, v_texcoord).x - 0.5;\n"
- FRAGMENT_CONVERT_YUV
- ;
-
-static const char texture_fragment_shader_y_xuxv[] =
- "precision mediump float;\n"
- "uniform sampler2D tex;\n"
- "uniform sampler2D tex1;\n"
- "varying vec2 v_texcoord;\n"
- "uniform float alpha;\n"
- "void main() {\n"
- " float y = 1.16438356 * (texture2D(tex, v_texcoord).x - 0.0625);\n"
- " float u = texture2D(tex1, v_texcoord).g - 0.5;\n"
- " float v = texture2D(tex1, v_texcoord).a - 0.5;\n"
- FRAGMENT_CONVERT_YUV
- ;
-
-static const char solid_fragment_shader[] =
- "precision mediump float;\n"
- "uniform vec4 color;\n"
- "uniform float alpha;\n"
+ /* INPUT_RGBA */
+ {1, shader_rgba_constructor, shader_texture_uniforms},
+
+ /* INPUT_EGL_EXTERNAL */
+ {1, shader_egl_external_constructor, shader_texture_uniforms},
+
+ /* INPUT_Y_UV */
+ {0, shader_yuv_constructor, shader_yuv_uniforms},
+
+ /* INPUT_Y_U_V */
+ {0, shader_yuv_constructor, shader_yuv_uniforms},
+
+ /* INPUT_Y_XUXV */
+ {0, shader_yuv_constructor, shader_yuv_uniforms},
+
+ /* INPUT_SOLID */
+ {1, shader_solid_constructor, shader_solid_uniforms},
+};
+
+static void
+attributes_from_permutation(size_t permutation, size_t *attributes)
+{
+ int i;
+ for (i = 0; i < ATTRIBUTE_COUNT; i++) {
+ size_t attribute_count = attribute_counts[i];
+ size_t attribute = permutation % attribute_count;
+ permutation /= attribute_count;
+ attributes[i] = attribute;
+ }
+}
+
+static size_t
+permutation_from_attributes(size_t *attributes)
+{
+ size_t i;
+ size_t result = 0, factor = 1;
+
+ for (i = 0; i < ATTRIBUTE_COUNT; i++) {
+ result += attributes[i] * factor;
+ factor *= attribute_counts[i];
+ }
+
+ return result;
+}
+
+static const char vertex_shader_source[] =
+ "uniform mat4 projection;\n"
+ "attribute vec2 position;\n"
+ "attribute vec2 attr_texture_coord;\n"
+ "varying vec2 texture_coord;\n"
"void main()\n"
"{\n"
- " gl_FragColor = alpha * color\n;"
- ;
+ " gl_Position = projection * vec4(position, 0.0, 1.0);\n"
+ " texture_coord = attr_texture_coord;\n"
+ "}\n";
-static int
-compile_shader(GLenum type, int count, const char **sources)
+static GLuint
+compile_shader(GLenum type, const char *source)
{
GLuint s;
char msg[512];
GLint status;
s = glCreateShader(type);
- glShaderSource(s, count, sources, NULL);
+ glShaderSource(s, 1, &source, NULL);
glCompileShader(s);
glGetShaderiv(s, GL_COMPILE_STATUS, &status);
if (!status) {
glGetShaderInfoLog(s, sizeof msg, NULL, msg);
+ weston_log("shader source: %s\n", source);
weston_log("shader info: %s\n", msg);
return GL_NONE;
}
@@ -179,106 +345,252 @@ compile_shader(GLenum type, int count, const char **sources)
return s;
}
-static int
-shader_init(struct gl_renderer *renderer, struct gl_shader *shader,
- const char *vertex_source, const char *fragment_source)
+static struct gl_shader *
+shader_create(GLuint vertex_shader,
+ const char *fragment_source)
{
char msg[512];
GLint status;
- int count;
- const char *sources[3];
-
- shader->vertex_shader =
- compile_shader(GL_VERTEX_SHADER, 1, &vertex_source);
-
- if (renderer->fragment_shader_debug) {
- sources[0] = fragment_source;
- sources[1] = fragment_debug;
- sources[2] = fragment_brace;
- count = 3;
- } else {
- sources[0] = fragment_source;
- sources[1] = fragment_brace;
- count = 2;
- }
+ GLuint program, fragment_shader;
+
+ struct gl_shader *shader;
+
+ fragment_shader =
+ compile_shader(GL_FRAGMENT_SHADER, fragment_source);
+
+ if (!fragment_shader)
+ return NULL;
+
+ shader = calloc(1, sizeof(struct gl_shader));
+
+ if (!shader)
+ return NULL;
+
+ program = glCreateProgram();
- shader->fragment_shader =
- compile_shader(GL_FRAGMENT_SHADER, count, sources);
+ glAttachShader(program, vertex_shader);
+ glAttachShader(program, fragment_shader);
- shader->program = glCreateProgram();
- glAttachShader(shader->program, shader->vertex_shader);
- glAttachShader(shader->program, shader->fragment_shader);
- glBindAttribLocation(shader->program, 0, "position");
- glBindAttribLocation(shader->program, 1, "texcoord");
+ glDeleteShader(fragment_shader);
+
+ glBindAttribLocation(program, 0, "position");
+ glBindAttribLocation(program, 1, "attr_texture_coord");
+
+ glLinkProgram(program);
+ glGetProgramiv(program, GL_LINK_STATUS, &status);
- glLinkProgram(shader->program);
- glGetProgramiv(shader->program, GL_LINK_STATUS, &status);
if (!status) {
- glGetProgramInfoLog(shader->program, sizeof msg, NULL, msg);
+ glGetProgramInfoLog(program, sizeof msg, NULL, msg);
weston_log("link info: %s\n", msg);
- return -1;
+ free(shader);
+ return NULL;
}
- shader->proj_uniform = glGetUniformLocation(shader->program, "proj");
- shader->tex_uniforms[0] = glGetUniformLocation(shader->program, "tex");
- shader->tex_uniforms[1] = glGetUniformLocation(shader->program, "tex1");
- shader->tex_uniforms[2] = glGetUniformLocation(shader->program, "tex2");
- shader->alpha_uniform = glGetUniformLocation(shader->program, "alpha");
- shader->color_uniform = glGetUniformLocation(shader->program, "color");
+ shader->program = program;
+ shader->projection_uniform = glGetUniformLocation(program,
+ "projection");
+ shader->alpha_uniform = glGetUniformLocation(program, "alpha");
- return 0;
+ return shader;
}
+
static void
-shader_release(struct gl_shader *shader)
+destroy_shaders(struct gl_shader **shaders, size_t count)
+{
+ size_t i;
+
+ for (i = 0; i < count; i++)
+ if (shaders[i]) {
+ glDeleteProgram(shaders[i]->program);
+ free(shaders[i]);
+ }
+
+ free(shaders);
+}
+
+static int
+create_shader_permutation(struct gl_renderer *renderer,
+ struct gl_shader **shader, size_t permutation, GLuint vertex_shader)
+{
+ struct shader_builder sb;
+ const char *fragment_shader;
+
+ attributes_from_permutation(permutation, sb.attributes);
+
+ sb.renderer = renderer;
+ sb.desc = &input_type_descs[sb.attributes[ATTRIBUTE_INPUT]];
+
+ shader_builder_init(&sb);
+
+ append(&sb.global, "precision mediump float;\n" \
+ "varying vec2 texture_coord;\n" \
+ "uniform float alpha;\n");
+
+ append(&sb.body, "void main()\n{\n");
+
+ if (!sb.desc->constructor(&sb)) {
+ shader_builder_release(&sb);
+ return 0;
+ }
+
+ append(&sb.body, "gl_FragColor *= alpha;\n");
+
+ if (renderer->fragment_shader_debug)
+ append(&sb.body, "gl_FragColor = vec4(0.0, 0.3, 0.0, 0.2) + " \
+ "gl_FragColor * 0.8;\n");
+
+ append(&sb.body, "}\n");
+
+ fragment_shader = shader_builder_get_string(&sb);
+
+ if (!fragment_shader)
+ goto error;
+
+ *shader = shader_create(vertex_shader, fragment_shader);
+
+ if (!*shader)
+ goto error;
+
+ glUseProgram((*shader)->program);
+
+ sb.desc->setup_uniforms(&sb, *shader);
+
+ shader_builder_release(&sb);
+
+ return 0;
+
+error:
+ shader_builder_release(&sb);
+ return -1;
+}
+
+static struct gl_shader **
+create_shader_permutations(struct gl_renderer *gr)
+{
+ struct gl_shader **shaders;
+ size_t i, permutations = 1;
+ unsigned int created = 0;
+ GLuint vertex_shader;
+
+ vertex_shader = compile_shader(GL_VERTEX_SHADER, vertex_shader_source);
+
+ if (!vertex_shader)
+ return NULL;
+
+ for (i = 0; i < ATTRIBUTE_COUNT; i++)
+ permutations *= attribute_counts[i];
+
+ shaders = calloc(permutations, sizeof(shaders));
+
+ if (!shaders)
+ return NULL;
+
+ for (i = 0; i < permutations; i++) {
+ if (create_shader_permutation(gr, &shaders[i],
+ i, vertex_shader) < 0)
+ goto error;
+
+ if (shaders[i])
+ created++;
+ }
+
+ gr->shader_count = permutations;
+
+ weston_log("Created %u shader permutations\n", created);
+
+ glDeleteShader(vertex_shader);
+
+ return shaders;
+
+error:
+ destroy_shaders(shaders, permutations);
+ glDeleteShader(vertex_shader);
+ return NULL;
+}
+
+struct gl_shader *
+gl_select_shader(struct gl_renderer *gr,
+ enum gl_input_attribute input,
+ enum gl_output_attribute output)
{
- glDeleteShader(shader->vertex_shader);
- glDeleteShader(shader->fragment_shader);
- glDeleteProgram(shader->program);
+ struct gl_shader *shader;
+ size_t attributes[ATTRIBUTE_COUNT] = {
+ input,
+ output,
+ CONVERSION_NONE
+ };
+
+ shader = gr->shaders[permutation_from_attributes(attributes)];
+
+ assert(shader);
- shader->vertex_shader = 0;
- shader->fragment_shader = 0;
- shader->program = 0;
+ return shader;
+}
+
+void
+gl_use_shader(struct gl_renderer *gr,
+ struct gl_shader *shader)
+{
+ if (gr->current_shader == shader)
+ return;
+
+ glUseProgram(shader->program);
+ gr->current_shader = shader;
+}
+
+void
+gl_shader_set_output(struct gl_shader *shader,
+ struct weston_output *output)
+{
+ GLfloat matrix[16];
+ size_t i;
+
+ for (i = 0; i < ARRAY_LENGTH(matrix); i++)
+ matrix[i] = output->matrix.d[i];
+
+ glUniformMatrix4fv(shader->projection_uniform,
+ 1, GL_FALSE, matrix);
+}
+
+void
+gl_shader_setup(struct gl_shader *shader,
+ struct weston_surface *surface,
+ struct weston_output *output)
+{
+ struct gl_surface_state *gs = get_surface_state(surface);
+
+ gl_shader_set_output(shader, output);
+
+ if (gs->input == INPUT_SOLID)
+ glUniform4fv(shader->color_uniform, 1, gs->color);
+
+ glUniform1f(shader->alpha_uniform, surface->alpha);
}
int
gl_init_shaders(struct gl_renderer *gr)
{
- if (shader_init(gr, &gr->texture_shader_rgba,
- vertex_shader, texture_fragment_shader_rgba) < 0)
- return -1;
- if (shader_init(gr, &gr->texture_shader_rgbx,
- vertex_shader, texture_fragment_shader_rgbx) < 0)
- return -1;
- if (gr->has_egl_image_external &&
- shader_init(gr, &gr->texture_shader_egl_external,
- vertex_shader, texture_fragment_shader_egl_external) < 0)
- return -1;
- if (shader_init(gr, &gr->texture_shader_y_uv,
- vertex_shader, texture_fragment_shader_y_uv) < 0)
- return -1;
- if (shader_init(gr, &gr->texture_shader_y_u_v,
- vertex_shader, texture_fragment_shader_y_u_v) < 0)
- return -1;
- if (shader_init(gr, &gr->texture_shader_y_xuxv,
- vertex_shader, texture_fragment_shader_y_xuxv) < 0)
- return -1;
- if (shader_init(gr, &gr->solid_shader,
- vertex_shader, solid_fragment_shader) < 0)
+ struct gl_shader **shaders = create_shader_permutations(gr);
+
+ if (!shaders)
return -1;
+ if (gr->shaders)
+ gl_destroy_shaders(gr);
+
+ gr->shaders = shaders;
+ gr->solid_shader = gl_select_shader(gr, INPUT_SOLID, OUTPUT_BLEND);
+
+ /* Force use_shader() to call glUseProgram(), since we need to use
+ * the recompiled version of the shader. */
+ gr->current_shader = NULL;
+
return 0;
}
void
gl_destroy_shaders(struct gl_renderer *gr)
{
- shader_release(&gr->texture_shader_rgba);
- shader_release(&gr->texture_shader_rgbx);
- shader_release(&gr->texture_shader_egl_external);
- shader_release(&gr->texture_shader_y_uv);
- shader_release(&gr->texture_shader_y_u_v);
- shader_release(&gr->texture_shader_y_xuxv);
- shader_release(&gr->solid_shader);
-
+ destroy_shaders(gr->shaders, gr->shader_count);
}
--
1.8.1.3
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