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gl-renderer: Compile shaders only when needed

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Saves some start up time by not compiling specific shaders until they
are needed.
This commit is contained in:
Ander Conselvan de Oliveira
2013-05-17 14:00:40 +03:00
committed by Kristian Høgsberg
parent f6128fcd6c
commit 1ed73246ed
1 changed files with 41 additions and 29 deletions
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src/gl-renderer.c
+41 -29
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@@ -44,6 +44,7 @@ struct gl_shader {
GLint tex_uniforms[3];
GLint alpha_uniform;
GLint color_uniform;
const char *vertex_source, *fragment_source;
};
#define BUFFER_DAMAGE_COUNT 2
@@ -717,13 +718,26 @@ use_output(struct weston_output *output)
return 0;
}
static int
shader_init(struct gl_shader *shader, struct gl_renderer *gr,
const char *vertex_source, const char *fragment_source);
static void
use_shader(struct gl_renderer *gr,
struct gl_shader *shader)
use_shader(struct gl_renderer *gr, struct gl_shader *shader)
{
if (!shader->program) {
int ret;
ret = shader_init(shader, gr,
shader->vertex_source,
shader->fragment_source);
if (ret < 0)
weston_log("warning: failed to compile shader\n");
}
if (gr->current_shader == shader)
return;
glUseProgram(shader->program);
gr->current_shader = shader;
}
@@ -1453,14 +1467,13 @@ compile_shader(GLenum type, int count, const char **sources)
}
static int
shader_init(struct gl_shader *shader, struct weston_compositor *ec,
shader_init(struct gl_shader *shader, struct gl_renderer *renderer,
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);
@@ -1844,28 +1857,29 @@ 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;
gr->texture_shader_rgba.vertex_source = vertex_shader;
gr->texture_shader_rgba.fragment_source = texture_fragment_shader_rgba;
gr->texture_shader_rgbx.vertex_source = vertex_shader;
gr->texture_shader_rgbx.fragment_source = texture_fragment_shader_rgbx;
gr->texture_shader_egl_external.vertex_source = vertex_shader;
gr->texture_shader_egl_external.fragment_source =
texture_fragment_shader_egl_external;
gr->texture_shader_y_uv.vertex_source = vertex_shader;
gr->texture_shader_y_uv.fragment_source = texture_fragment_shader_y_uv;
gr->texture_shader_y_u_v.vertex_source = vertex_shader;
gr->texture_shader_y_u_v.fragment_source =
texture_fragment_shader_y_u_v;
gr->texture_shader_y_u_v.vertex_source = vertex_shader;
gr->texture_shader_y_xuxv.fragment_source =
texture_fragment_shader_y_xuxv;
gr->solid_shader.vertex_source = vertex_shader;
gr->solid_shader.fragment_source = solid_fragment_shader;
return 0;
}
@@ -1888,8 +1902,6 @@ fragment_debug_binding(struct weston_seat *seat, uint32_t time, uint32_t key,
shader_release(&gr->texture_shader_y_xuxv);
shader_release(&gr->solid_shader);
compile_shaders(ec);
/* Force use_shader() to call glUseProgram(), since we need to use
* the recompiled version of the shader. */
gr->current_shader = NULL;