vo_opengl: support compute shaders

These can either be invoked as dispatch_compute to do a single
computation, or finish_pass_fbo (after setting compute_size_minimum) to
render to a new texture using a compute shader. To make this stuff all
work transparently, we try really, really hard to make compute shaders
as identical to fragment shaders as possible in their behavior.

1 files changed, 6 insertions, 1 deletions

diff --git a/video/out/opengl/utils.h b/video/out/opengl/utils.h
index 4327b74b8f..3dc7e5d72d 100644
--- a/video/out/opengl/utils.h
+++ b/video/out/opengl/utils.h
@@ -66,6 +66,7 @@ bool fbotex_change(struct fbotex *fbo, GL *gl, struct mp_log *log, int w, int h,
 #define FBOTEX_FUZZY_W 1
 #define FBOTEX_FUZZY_H 2
 #define FBOTEX_FUZZY (FBOTEX_FUZZY_W | FBOTEX_FUZZY_H)
+#define FBOTEX_COMPUTE 4
 void fbotex_set_filter(struct fbotex *fbo, GLenum gl_filter);
 void fbotex_invalidate(struct fbotex *fbo);
 
@@ -141,9 +142,13 @@ void gl_sc_hadd(struct gl_shader_cache *sc, const char *text);
 void gl_sc_haddf(struct gl_shader_cache *sc, const char *textf, ...)
     PRINTF_ATTRIBUTE(2, 3);
 void gl_sc_hadd_bstr(struct gl_shader_cache *sc, struct bstr text);
+void gl_sc_paddf(struct gl_shader_cache *sc, const char *textf, ...)
+    PRINTF_ATTRIBUTE(2, 3);
 void gl_sc_uniform_tex(struct gl_shader_cache *sc, char *name, GLenum target,
                        GLuint texture);
 void gl_sc_uniform_tex_ui(struct gl_shader_cache *sc, char *name, GLuint texture);
+void gl_sc_uniform_image2D(struct gl_shader_cache *sc, char *name, GLuint texture,
+                           GLuint iformat, GLenum access);
 void gl_sc_uniform_f(struct gl_shader_cache *sc, char *name, GLfloat f);
 void gl_sc_uniform_i(struct gl_shader_cache *sc, char *name, GLint f);
 void gl_sc_uniform_vec2(struct gl_shader_cache *sc, char *name, GLfloat f[2]);
@@ -156,7 +161,7 @@ void gl_sc_set_vertex_format(struct gl_shader_cache *sc,
                              const struct gl_vao_entry *entries,
                              size_t vertex_size);
 void gl_sc_enable_extension(struct gl_shader_cache *sc, char *name);
-struct mp_pass_perf gl_sc_generate(struct gl_shader_cache *sc);
+struct mp_pass_perf gl_sc_generate(struct gl_shader_cache *sc, GLenum type);
 void gl_sc_draw_data(struct gl_shader_cache *sc, GLenum prim, void *ptr,
                      size_t num);
 void gl_sc_reset(struct gl_shader_cache *sc);