[RFC weston 1/2] gl-renderer: Move shader functions into it's own file.
John Kåre Alsaker
john.kare.alsaker at gmail.com
Wed Nov 14 07:41:41 PST 2012
This moves all shader functions into it's own file in preparation of a more
flexible shader generation. It adds gl-internal.h for shared definitions
between the files.
---
src/Makefile.am | 2 +
src/gl-internal.h | 138 ++++++++++++++++++++
src/gl-renderer.c | 376 ++----------------------------------------------------
src/gl-shaders.c | 284 +++++++++++++++++++++++++++++++++++++++++
4 files changed, 437 insertions(+), 363 deletions(-)
create mode 100644 src/gl-internal.h
create mode 100644 src/gl-shaders.c
diff --git a/src/Makefile.am b/src/Makefile.am
index ef71d00..0c315cd 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -34,6 +34,8 @@ weston_SOURCES = \
util.c \
matrix.c \
matrix.h \
+ gl-shaders.c \
+ gl-internal.h \
gl-renderer.h \
gl-renderer.c \
noop-renderer.c \
diff --git a/src/gl-internal.h b/src/gl-internal.h
new file mode 100644
index 0000000..90912df
--- /dev/null
+++ b/src/gl-internal.h
@@ -0,0 +1,138 @@
+/*
+ * Copyright © 2012 Intel Corporation
+ * Copyright © 2012 John Kåre Alsaker
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and
+ * its documentation for any purpose is hereby granted without fee, provided
+ * that the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of the copyright holders not be used in
+ * advertising or publicity pertaining to distribution of the software
+ * without specific, written prior permission. The copyright holders make
+ * no representations about the suitability of this software for any
+ * purpose. It is provided "as is" without express or implied warranty.
+ *
+ * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
+ * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
+ * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
+ * CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef _GL_INTERNAL_H_
+#define _GL_INTERNAL_H_
+
+#include <GLES2/gl2.h>
+#include <GLES2/gl2ext.h>
+
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#include <float.h>
+#include <assert.h>
+#include <linux/input.h>
+
+#include "gl-renderer.h"
+
+#include <EGL/eglext.h>
+#include "weston-egl-ext.h"
+
+struct gl_shader {
+ GLuint program;
+ GLuint vertex_shader, fragment_shader;
+ GLint proj_uniform;
+ GLint tex_uniforms[3];
+ GLint alpha_uniform;
+ GLint color_uniform;
+};
+
+struct gl_output_state {
+ EGLSurface egl_surface;
+};
+
+struct gl_surface_state {
+ GLfloat color[4];
+ struct gl_shader *shader;
+
+ GLuint textures[3];
+ int num_textures;
+
+ EGLImageKHR images[3];
+ GLenum target;
+ int num_images;
+};
+
+struct gl_renderer {
+ struct weston_renderer base;
+ int fragment_shader_debug;
+
+ EGLDisplay egl_display;
+ EGLContext egl_context;
+ EGLConfig egl_config;
+
+ struct {
+ int32_t top, bottom, left, right;
+ GLuint texture;
+ int32_t width, height;
+ } border;
+
+ PFNGLEGLIMAGETARGETTEXTURE2DOESPROC image_target_texture_2d;
+ PFNEGLCREATEIMAGEKHRPROC create_image;
+ PFNEGLDESTROYIMAGEKHRPROC destroy_image;
+
+ int has_unpack_subimage;
+
+ PFNEGLBINDWAYLANDDISPLAYWL bind_display;
+ PFNEGLUNBINDWAYLANDDISPLAYWL unbind_display;
+ PFNEGLQUERYWAYLANDBUFFERWL query_buffer;
+ int has_bind_display;
+
+ 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 *current_shader;
+};
+
+static inline struct gl_output_state *
+get_output_state(struct weston_output *output)
+{
+ return (struct gl_output_state *)output->renderer_state;
+}
+
+static inline struct gl_surface_state *
+get_surface_state(struct weston_surface *surface)
+{
+ return (struct gl_surface_state *)surface->renderer_state;
+}
+
+static inline struct gl_renderer *
+get_renderer(struct weston_compositor *ec)
+{
+ return (struct gl_renderer *)ec->renderer;
+}
+
+int
+gl_init_shaders(struct gl_renderer *gr);
+
+void
+gl_destroy_shaders(struct gl_renderer *gr);
+
+void
+gl_use_shader(struct gl_renderer *gr,
+ struct gl_shader *shader);
+
+void
+gl_shader_uniforms(struct gl_shader *shader,
+ struct weston_surface *surface,
+ struct weston_output *output);
+
+#endif
diff --git a/src/gl-renderer.c b/src/gl-renderer.c
index 45b60dd..a14fe2f 100644
--- a/src/gl-renderer.c
+++ b/src/gl-renderer.c
@@ -1,5 +1,6 @@
/*
* Copyright © 2012 Intel Corporation
+ * Copyright © 2012 John Kåre Alsaker
*
* Permission to use, copy, modify, distribute, and sell this software and
* its documentation for any purpose is hereby granted without fee, provided
@@ -22,101 +23,7 @@
#define _GNU_SOURCE
-#include <GLES2/gl2.h>
-#include <GLES2/gl2ext.h>
-
-#include <stdlib.h>
-#include <string.h>
-#include <ctype.h>
-#include <float.h>
-#include <assert.h>
-#include <linux/input.h>
-
-#include "gl-renderer.h"
-
-#include <EGL/eglext.h>
-#include "weston-egl-ext.h"
-
-struct gl_shader {
- GLuint program;
- GLuint vertex_shader, fragment_shader;
- GLint proj_uniform;
- GLint tex_uniforms[3];
- GLint alpha_uniform;
- GLint color_uniform;
-};
-
-struct gl_output_state {
- EGLSurface egl_surface;
-};
-
-struct gl_surface_state {
- GLfloat color[4];
- struct gl_shader *shader;
-
- GLuint textures[3];
- int num_textures;
-
- EGLImageKHR images[3];
- GLenum target;
- int num_images;
-};
-
-struct gl_renderer {
- struct weston_renderer base;
- int fragment_shader_debug;
-
- EGLDisplay egl_display;
- EGLContext egl_context;
- EGLConfig egl_config;
-
- struct {
- int32_t top, bottom, left, right;
- GLuint texture;
- int32_t width, height;
- } border;
-
- PFNGLEGLIMAGETARGETTEXTURE2DOESPROC image_target_texture_2d;
- PFNEGLCREATEIMAGEKHRPROC create_image;
- PFNEGLDESTROYIMAGEKHRPROC destroy_image;
-
- int has_unpack_subimage;
-
- PFNEGLBINDWAYLANDDISPLAYWL bind_display;
- PFNEGLUNBINDWAYLANDDISPLAYWL unbind_display;
- PFNEGLQUERYWAYLANDBUFFERWL query_buffer;
- int has_bind_display;
-
- 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 *current_shader;
-};
-
-static inline struct gl_output_state *
-get_output_state(struct weston_output *output)
-{
- return (struct gl_output_state *)output->renderer_state;
-}
-
-static inline struct gl_surface_state *
-get_surface_state(struct weston_surface *surface)
-{
- return (struct gl_surface_state *)surface->renderer_state;
-}
-
-static inline struct gl_renderer *
-get_renderer(struct weston_compositor *ec)
-{
- return (struct gl_renderer *)ec->renderer;
-}
+#include "gl-internal.h"
static const char *
egl_error_string(EGLint code)
@@ -689,34 +596,6 @@ use_output(struct weston_output *output)
}
static void
-use_shader(struct gl_renderer *gr,
- struct gl_shader *shader)
-{
- if (gr->current_shader == shader)
- return;
-
- glUseProgram(shader->program);
- gr->current_shader = shader;
-}
-
-static void
-shader_uniforms(struct gl_shader *shader,
- struct weston_surface *surface,
- struct weston_output *output)
-{
- int i;
- struct gl_surface_state *gs = get_surface_state(surface);
-
- 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 < gs->num_textures; i++)
- glUniform1i(shader->tex_uniforms[i], i);
-}
-
-static void
draw_surface(struct weston_surface *es, struct weston_output *output,
pixman_region32_t *damage) /* in global coordinates */
{
@@ -745,12 +624,12 @@ draw_surface(struct weston_surface *es, struct weston_output *output,
glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
if (ec->fan_debug) {
- use_shader(gr, &gr->solid_shader);
- shader_uniforms(&gr->solid_shader, es, output);
+ gl_use_shader(gr, &gr->solid_shader);
+ gl_shader_uniforms(&gr->solid_shader, es, output);
}
- use_shader(gr, gs->shader);
- shader_uniforms(gs->shader, es, output);
+ gl_use_shader(gr, gs->shader);
+ gl_shader_uniforms(gs->shader, es, output);
if (es->transform.enabled || output->zoom.active)
filter = GL_LINEAR;
@@ -776,8 +655,8 @@ draw_surface(struct weston_surface *es, struct weston_output *output,
* that forces texture alpha = 1.0.
* Xwayland surfaces need this.
*/
- use_shader(gr, &gr->texture_shader_rgbx);
- shader_uniforms(&gr->texture_shader_rgbx, es, output);
+ gl_use_shader(gr, &gr->texture_shader_rgbx);
+ gl_shader_uniforms(&gr->texture_shader_rgbx, es, output);
}
if (es->alpha < 1.0)
@@ -789,7 +668,7 @@ draw_surface(struct weston_surface *es, struct weston_output *output,
}
if (pixman_region32_not_empty(&surface_blend)) {
- use_shader(gr, gs->shader);
+ gl_use_shader(gr, gs->shader);
glEnable(GL_BLEND);
repaint_region(es, &repaint, &surface_blend);
}
@@ -898,7 +777,7 @@ draw_border(struct weston_output *output)
int n;
glDisable(GL_BLEND);
- use_shader(gr, shader);
+ gl_use_shader(gr, shader);
glUniformMatrix4fv(shader->proj_uniform,
1, GL_FALSE, output->matrix.d);
@@ -1230,197 +1109,6 @@ gl_renderer_destroy_surface(struct weston_surface *surface)
free(gs);
}
-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";
-
-/* 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"
-
-static const char fragment_debug[] =
- " gl_FragColor = vec4(0.0, 0.3, 0.0, 0.2) + gl_FragColor * 0.8;\n";
-
-static const char fragment_brace[] =
- "}\n";
-
-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"
- "void main()\n"
- "{\n"
- " gl_FragColor = alpha * color\n;"
- ;
-
-static int
-compile_shader(GLenum type, int count, const char **sources)
-{
- GLuint s;
- char msg[512];
- GLint status;
-
- s = glCreateShader(type);
- glShaderSource(s, count, sources, NULL);
- glCompileShader(s);
- glGetShaderiv(s, GL_COMPILE_STATUS, &status);
- if (!status) {
- glGetShaderInfoLog(s, sizeof msg, NULL, msg);
- weston_log("shader info: %s\n", msg);
- return GL_NONE;
- }
-
- return s;
-}
-
-static int
-shader_init(struct gl_shader *shader, struct weston_compositor *ec,
- const char *vertex_source, const char *fragment_source)
-{
- char msg[512];
- GLint status;
- int count;
- const char *sources[3];
- struct gl_renderer *renderer = get_renderer(ec);
-
- 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;
- }
-
- shader->fragment_shader =
- compile_shader(GL_FRAGMENT_SHADER, count, sources);
-
- 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");
-
- glLinkProgram(shader->program);
- glGetProgramiv(shader->program, GL_LINK_STATUS, &status);
- if (!status) {
- glGetProgramInfoLog(shader->program, sizeof msg, NULL, msg);
- weston_log("link info: %s\n", msg);
- return -1;
- }
-
- 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");
-
- return 0;
-}
-
-static void
-shader_release(struct gl_shader *shader)
-{
- glDeleteShader(shader->vertex_shader);
- glDeleteShader(shader->fragment_shader);
- glDeleteProgram(shader->program);
-
- shader->vertex_shader = 0;
- shader->fragment_shader = 0;
- shader->program = 0;
-}
-
static void
log_extensions(const char *name, const char *extensions)
{
@@ -1730,37 +1418,6 @@ gl_renderer_display(struct weston_compositor *ec)
return get_renderer(ec)->egl_display;
}
-static int
-compile_shaders(struct weston_compositor *ec)
-{
- struct gl_renderer *gr = get_renderer(ec);
-
- if (shader_init(&gr->texture_shader_rgba, ec,
- vertex_shader, texture_fragment_shader_rgba) < 0)
- return -1;
- if (shader_init(&gr->texture_shader_rgbx, ec,
- vertex_shader, texture_fragment_shader_rgbx) < 0)
- return -1;
- if (gr->has_egl_image_external &&
- shader_init(&gr->texture_shader_egl_external, ec,
- vertex_shader, texture_fragment_shader_egl_external) < 0)
- return -1;
- if (shader_init(&gr->texture_shader_y_uv, ec,
- vertex_shader, texture_fragment_shader_y_uv) < 0)
- return -1;
- if (shader_init(&gr->texture_shader_y_u_v, ec,
- vertex_shader, texture_fragment_shader_y_u_v) < 0)
- return -1;
- if (shader_init(&gr->texture_shader_y_xuxv, ec,
- vertex_shader, texture_fragment_shader_y_xuxv) < 0)
- return -1;
- if (shader_init(&gr->solid_shader, ec,
- vertex_shader, solid_fragment_shader) < 0)
- return -1;
-
- return 0;
-}
-
static void
fragment_debug_binding(struct wl_seat *seat, uint32_t time, uint32_t key,
void *data)
@@ -1771,15 +1428,8 @@ fragment_debug_binding(struct wl_seat *seat, uint32_t time, uint32_t key,
gr->fragment_shader_debug ^= 1;
- 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);
-
- compile_shaders(ec);
+ gl_destroy_shaders(gr);
+ gl_init_shaders(gr);
wl_list_for_each(output, &ec->output_list, link)
weston_output_damage(output);
@@ -1873,7 +1523,7 @@ gl_renderer_setup(struct weston_compositor *ec, EGLSurface egl_surface)
glActiveTexture(GL_TEXTURE0);
- if (compile_shaders(ec))
+ if (gl_init_shaders(gr) < 0)
return -1;
weston_compositor_add_debug_binding(ec, KEY_S,
diff --git a/src/gl-shaders.c b/src/gl-shaders.c
new file mode 100644
index 0000000..35275ca
--- /dev/null
+++ b/src/gl-shaders.c
@@ -0,0 +1,284 @@
+/*
+ * Copyright © 2012 John Kåre Alsaker
+ * Copyright © 2012 Intel Corporation
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and
+ * its documentation for any purpose is hereby granted without fee, provided
+ * that the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of the copyright holders not be used in
+ * advertising or publicity pertaining to distribution of the software
+ * without specific, written prior permission. The copyright holders make
+ * no representations about the suitability of this software for any
+ * purpose. It is provided "as is" without express or implied warranty.
+ *
+ * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
+ * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
+ * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
+ * CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "gl-internal.h"
+
+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_uniforms(struct gl_shader *shader,
+ struct weston_surface *surface,
+ struct weston_output *output)
+{
+ int i;
+ struct gl_surface_state *gs = get_surface_state(surface);
+
+ 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 < gs->num_textures; i++)
+ glUniform1i(shader->tex_uniforms[i], i);
+}
+
+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";
+
+/* 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"
+
+static const char fragment_debug[] =
+ " gl_FragColor = vec4(0.0, 0.3, 0.0, 0.2) + gl_FragColor * 0.8;\n";
+
+static const char fragment_brace[] =
+ "}\n";
+
+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"
+ "void main()\n"
+ "{\n"
+ " gl_FragColor = alpha * color\n;"
+ ;
+
+static int
+compile_shader(GLenum type, int count, const char **sources)
+{
+ GLuint s;
+ char msg[512];
+ GLint status;
+
+ s = glCreateShader(type);
+ glShaderSource(s, count, sources, NULL);
+ glCompileShader(s);
+ glGetShaderiv(s, GL_COMPILE_STATUS, &status);
+ if (!status) {
+ glGetShaderInfoLog(s, sizeof msg, NULL, msg);
+ weston_log("shader info: %s\n", msg);
+ return GL_NONE;
+ }
+
+ return s;
+}
+
+static int
+shader_init(struct gl_renderer *renderer, struct gl_shader *shader,
+ const char *vertex_source, 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;
+ }
+
+ shader->fragment_shader =
+ compile_shader(GL_FRAGMENT_SHADER, count, sources);
+
+ 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");
+
+ glLinkProgram(shader->program);
+ glGetProgramiv(shader->program, GL_LINK_STATUS, &status);
+ if (!status) {
+ glGetProgramInfoLog(shader->program, sizeof msg, NULL, msg);
+ weston_log("link info: %s\n", msg);
+ return -1;
+ }
+
+ 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");
+
+ return 0;
+}
+
+static void
+shader_release(struct gl_shader *shader)
+{
+ glDeleteShader(shader->vertex_shader);
+ glDeleteShader(shader->fragment_shader);
+ glDeleteProgram(shader->program);
+
+ shader->vertex_shader = 0;
+ shader->fragment_shader = 0;
+ shader->program = 0;
+}
+
+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)
+ return -1;
+
+ 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);
+
+}
--
1.8.0
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