ssbo impl

demos/99-compute.c

@@ -5,16 +5,30 @@ int main() {
     window_create(50, WINDOW_SQUARE);
     window_title(__FILE__);
 
+    unsigned TEX_WIDTH = 1000;
+
     unsigned comp = compute(vfs_read("shaders/compute-test.glsl"));
-    texture_t tex = texture_create(512, 512, 4, 0, TEXTURE_LINEAR|TEXTURE_FLOAT);
+    texture_t tex = texture_create(TEX_WIDTH, TEX_WIDTH, 4, 0, TEXTURE_LINEAR|TEXTURE_FLOAT);
+    shader_bind(comp);
+    shader_image(tex, 0, 0, 0, READ);
+
+    struct {
+        float f;
+    } data;
+
+    unsigned buf = ssbo_create(&data, sizeof(data), STREAM_DRAW);
 
     while ( window_swap() && !input_down(KEY_ESC) ){
         if (input(KEY_F5)) window_reload();
+        
         shader_bind(comp);
-        shader_float("t", (float)window_time());
-        shader_image(tex, 0, 0, -1, READ);
-        dispatch(512, 512, 1);
+        data.f = (float)window_time();
+        ssbo_bind(buf, 1);
+        ssbo_update(0, sizeof(data), &data);
+        
+        dispatch(TEX_WIDTH/10, TEX_WIDTH/10, 1);
         image_write_barrier();
+        
         fullscreen_quad_rgb(tex, 2.2);
     }
 

demos/art/shaders/compute-test.glsl

@@ -2,7 +2,9 @@ layout (local_size_x = 10, local_size_y = 10, local_size_z = 1) in;
 
 layout(rgba32f, binding = 0) uniform image2D imgOutput;
 
-layout (location = 0) uniform float t;                 /** Time */
+layout (binding = 1) buffer ssbo_data {
+    float t;
+};
 
 void main() {
     vec4 value = vec4(0.0, 0.0, 0.0, 1.0);

engine/bind/v4k.lua

@@ -2370,6 +2370,24 @@ READ_WRITE
  void shader_image_unit(unsigned texture, unsigned unit, unsigned level, int layer , unsigned texel_type, unsigned access);
  void image_write_barrier();
  void write_barrier();
+enum USAGE_MODE {
+STATIC_DRAW,
+STATIC_READ,
+STATIC_COPY,
+DYNAMIC_DRAW,
+DYNAMIC_READ,
+DYNAMIC_COPY,
+STREAM_DRAW,
+STREAM_READ,
+STREAM_COPY
+};
+ unsigned ssbo_create(const void *data, int len, unsigned usage);
+ void ssbo_destroy(unsigned ssbo);
+ void ssbo_update(int offset, int len, const void *data);
+ void ssbo_bind(unsigned ssbo, unsigned unit);
+ void *ssbo_map(unsigned access);
+ void ssbo_unmap();
+ void ssbo_unbind();
 enum MESH_FLAGS {
 MESH_STATIC = 0,
 MESH_STREAM = 1,

engine/joint/v4k.h

@@ -16496,6 +16496,29 @@ API void shader_image_unit(unsigned texture, unsigned unit, unsigned level, int
 API void image_write_barrier();
 API void write_barrier();
 
+// ssbo
+enum USAGE_MODE {
+    STATIC_DRAW,
+    STATIC_READ,
+    STATIC_COPY,
+
+    DYNAMIC_DRAW,
+    DYNAMIC_READ,
+    DYNAMIC_COPY,
+
+    STREAM_DRAW,
+    STREAM_READ,
+    STREAM_COPY
+};
+
+API unsigned ssbo_create(const void *data, int len, unsigned usage);
+API void ssbo_destroy(unsigned ssbo);
+API void ssbo_update(int offset, int len, const void *data);
+API void ssbo_bind(unsigned ssbo, unsigned unit);
+API void *ssbo_map(unsigned access);
+API void ssbo_unmap();
+API void ssbo_unbind();
+
 // -----------------------------------------------------------------------------
 // meshes (@fixme: deprecate?)
 
@@ -340115,7 +340138,7 @@ unsigned compute(const char *cs){
     #else
     PRINTF(/*"!"*/"Compiling compute shader\n");
 
-    cs = cs[0] == '#' && cs[1] == 'c' ? cs : va("#version 430 core\n%s", cs ? cs : "");
+    cs = cs[0] == '#' && cs[1] == 'c' ? cs : va("#version 450 core\n%s", cs ? cs : "");
 
     GLuint comp = shader_compile(GL_COMPUTE_SHADER, cs);
     GLuint program = 0;
@@ -340169,6 +340192,40 @@ void shader_destroy(unsigned program){
 // if(s->name) FREE(s->name), s->name = NULL;
 }
 
+unsigned ssbo_create(const void *data, int len, unsigned usage){
+    static GLuint gl_usage[] = { GL_STATIC_DRAW, GL_STATIC_READ, GL_STATIC_COPY, GL_DYNAMIC_DRAW, GL_DYNAMIC_READ, GL_DYNAMIC_COPY, GL_STREAM_DRAW, GL_STREAM_READ, GL_STREAM_COPY };
+    GLuint ssbo;
+    glGenBuffers(1, &ssbo);
+    glBindBuffer(GL_SHADER_STORAGE_BUFFER, ssbo);
+    glBufferData(GL_SHADER_STORAGE_BUFFER, len, data, gl_usage[usage]);
+    return ssbo;
+}
+
+void ssbo_destroy(unsigned ssbo){
+    glDeleteBuffers(1, &ssbo);
+}
+
+void ssbo_update(int offset, int len, const void *data){
+    glBufferSubData(GL_SHADER_STORAGE_BUFFER, offset, len, data);
+}
+
+void *ssbo_map(unsigned access){
+    static GLenum gl_access[] = {GL_READ_ONLY, GL_WRITE_ONLY, GL_READ_WRITE};
+    return glMapBuffer(GL_SHADER_STORAGE_BUFFER, gl_access[access]);
+}
+void ssbo_unmap(){
+    glUnmapBuffer(GL_SHADER_STORAGE_BUFFER);
+}
+
+void ssbo_bind(unsigned ssbo, unsigned unit){
+    glBindBuffer(GL_SHADER_STORAGE_BUFFER, ssbo);
+    glBindBufferBase(GL_SHADER_STORAGE_BUFFER, unit, ssbo);
+}
+
+void ssbo_unbind(){
+    glBindBuffer(GL_SHADER_STORAGE_BUFFER, 0);
+}
+
 static __thread unsigned last_shader = -1;
 static
 int shader_uniform(const char *name) {
@@ -340199,7 +340256,7 @@ void shader_image(texture_t t, unsigned unit, unsigned level, int layer /* -1 to
     shader_image_unit(t.id, unit, level, layer, t.texel_type, access);
 }
 void shader_image_unit(unsigned texture, unsigned unit, unsigned level, int layer, unsigned texel_type, unsigned access){
-    GLenum gl_access[] = {GL_READ_ONLY, GL_WRITE_ONLY, GL_READ_WRITE};
+    static GLenum gl_access[] = {GL_READ_ONLY, GL_WRITE_ONLY, GL_READ_WRITE};
     glBindImageTexture(unit, texture, level, layer!=-1, layer!=-1?layer:0, gl_access[access], texel_type);
 }
 
@@ -349545,7 +349602,7 @@ void window_hints(unsigned flags) {
     glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 2); // osx, 2:#version150,3:330
     #else
     glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 4);
-    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 5);
     #endif
     #ifdef __APPLE__
         glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); //osx

engine/split/v4k_render.c

@@ -200,7 +200,7 @@ unsigned compute(const char *cs){
     #else
     PRINTF(/*"!"*/"Compiling compute shader\n");
 
-    cs = cs[0] == '#' && cs[1] == 'c' ? cs : va("#version 430 core\n%s", cs ? cs : "");
+    cs = cs[0] == '#' && cs[1] == 'c' ? cs : va("#version 450 core\n%s", cs ? cs : "");
 
     GLuint comp = shader_compile(GL_COMPUTE_SHADER, cs);
     GLuint program = 0;
@@ -254,6 +254,40 @@ void shader_destroy(unsigned program){
 // if(s->name) FREE(s->name), s->name = NULL;
 }
 
+unsigned ssbo_create(const void *data, int len, unsigned usage){
+    static GLuint gl_usage[] = { GL_STATIC_DRAW, GL_STATIC_READ, GL_STATIC_COPY, GL_DYNAMIC_DRAW, GL_DYNAMIC_READ, GL_DYNAMIC_COPY, GL_STREAM_DRAW, GL_STREAM_READ, GL_STREAM_COPY };
+    GLuint ssbo;
+    glGenBuffers(1, &ssbo);
+    glBindBuffer(GL_SHADER_STORAGE_BUFFER, ssbo);
+    glBufferData(GL_SHADER_STORAGE_BUFFER, len, data, gl_usage[usage]);
+    return ssbo;
+}
+
+void ssbo_destroy(unsigned ssbo){
+    glDeleteBuffers(1, &ssbo);
+}
+
+void ssbo_update(int offset, int len, const void *data){
+    glBufferSubData(GL_SHADER_STORAGE_BUFFER, offset, len, data);
+}
+
+void *ssbo_map(unsigned access){
+    static GLenum gl_access[] = {GL_READ_ONLY, GL_WRITE_ONLY, GL_READ_WRITE};
+    return glMapBuffer(GL_SHADER_STORAGE_BUFFER, gl_access[access]);
+}
+void ssbo_unmap(){
+    glUnmapBuffer(GL_SHADER_STORAGE_BUFFER);
+}
+
+void ssbo_bind(unsigned ssbo, unsigned unit){
+    glBindBuffer(GL_SHADER_STORAGE_BUFFER, ssbo);
+    glBindBufferBase(GL_SHADER_STORAGE_BUFFER, unit, ssbo);
+}
+
+void ssbo_unbind(){
+    glBindBuffer(GL_SHADER_STORAGE_BUFFER, 0);
+}
+
 static __thread unsigned last_shader = -1;
 static
 int shader_uniform(const char *name) {
@@ -284,7 +318,7 @@ void shader_image(texture_t t, unsigned unit, unsigned level, int layer /* -1 to
     shader_image_unit(t.id, unit, level, layer, t.texel_type, access);
 }
 void shader_image_unit(unsigned texture, unsigned unit, unsigned level, int layer, unsigned texel_type, unsigned access){
-    GLenum gl_access[] = {GL_READ_ONLY, GL_WRITE_ONLY, GL_READ_WRITE};
+    static GLenum gl_access[] = {GL_READ_ONLY, GL_WRITE_ONLY, GL_READ_WRITE};
     glBindImageTexture(unit, texture, level, layer!=-1, layer!=-1?layer:0, gl_access[access], texel_type);
 }
 

engine/split/v4k_render.h

@@ -341,6 +341,29 @@ API void shader_image_unit(unsigned texture, unsigned unit, unsigned level, int
 API void image_write_barrier();
 API void write_barrier();
 
+// ssbo
+enum USAGE_MODE {
+    STATIC_DRAW,
+    STATIC_READ,
+    STATIC_COPY,
+
+    DYNAMIC_DRAW,
+    DYNAMIC_READ,
+    DYNAMIC_COPY,
+
+    STREAM_DRAW,
+    STREAM_READ,
+    STREAM_COPY
+};
+
+API unsigned ssbo_create(const void *data, int len, unsigned usage);
+API void ssbo_destroy(unsigned ssbo);
+API void ssbo_update(int offset, int len, const void *data);
+API void ssbo_bind(unsigned ssbo, unsigned unit);
+API void *ssbo_map(unsigned access);
+API void ssbo_unmap();
+API void ssbo_unbind();
+
 // -----------------------------------------------------------------------------
 // meshes (@fixme: deprecate?)
 

engine/split/v4k_window.c

@@ -175,7 +175,7 @@ void window_hints(unsigned flags) {
     glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 2); // osx, 2:#version150,3:330
     #else
     glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 4);
-    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 5);
     #endif
     #ifdef __APPLE__
         glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); //osx

engine/v4k.c

@@ -11114,7 +11114,7 @@ unsigned compute(const char *cs){
     #else
     PRINTF(/*"!"*/"Compiling compute shader\n");
 
-    cs = cs[0] == '#' && cs[1] == 'c' ? cs : va("#version 430 core\n%s", cs ? cs : "");
+    cs = cs[0] == '#' && cs[1] == 'c' ? cs : va("#version 450 core\n%s", cs ? cs : "");
 
     GLuint comp = shader_compile(GL_COMPUTE_SHADER, cs);
     GLuint program = 0;
@@ -11168,6 +11168,40 @@ void shader_destroy(unsigned program){
 // if(s->name) FREE(s->name), s->name = NULL;
 }
 
+unsigned ssbo_create(const void *data, int len, unsigned usage){
+    static GLuint gl_usage[] = { GL_STATIC_DRAW, GL_STATIC_READ, GL_STATIC_COPY, GL_DYNAMIC_DRAW, GL_DYNAMIC_READ, GL_DYNAMIC_COPY, GL_STREAM_DRAW, GL_STREAM_READ, GL_STREAM_COPY };
+    GLuint ssbo;
+    glGenBuffers(1, &ssbo);
+    glBindBuffer(GL_SHADER_STORAGE_BUFFER, ssbo);
+    glBufferData(GL_SHADER_STORAGE_BUFFER, len, data, gl_usage[usage]);
+    return ssbo;
+}
+
+void ssbo_destroy(unsigned ssbo){
+    glDeleteBuffers(1, &ssbo);
+}
+
+void ssbo_update(int offset, int len, const void *data){
+    glBufferSubData(GL_SHADER_STORAGE_BUFFER, offset, len, data);
+}
+
+void *ssbo_map(unsigned access){
+    static GLenum gl_access[] = {GL_READ_ONLY, GL_WRITE_ONLY, GL_READ_WRITE};
+    return glMapBuffer(GL_SHADER_STORAGE_BUFFER, gl_access[access]);
+}
+void ssbo_unmap(){
+    glUnmapBuffer(GL_SHADER_STORAGE_BUFFER);
+}
+
+void ssbo_bind(unsigned ssbo, unsigned unit){
+    glBindBuffer(GL_SHADER_STORAGE_BUFFER, ssbo);
+    glBindBufferBase(GL_SHADER_STORAGE_BUFFER, unit, ssbo);
+}
+
+void ssbo_unbind(){
+    glBindBuffer(GL_SHADER_STORAGE_BUFFER, 0);
+}
+
 static __thread unsigned last_shader = -1;
 static
 int shader_uniform(const char *name) {
@@ -11198,7 +11232,7 @@ void shader_image(texture_t t, unsigned unit, unsigned level, int layer /* -1 to
     shader_image_unit(t.id, unit, level, layer, t.texel_type, access);
 }
 void shader_image_unit(unsigned texture, unsigned unit, unsigned level, int layer, unsigned texel_type, unsigned access){
-    GLenum gl_access[] = {GL_READ_ONLY, GL_WRITE_ONLY, GL_READ_WRITE};
+    static GLenum gl_access[] = {GL_READ_ONLY, GL_WRITE_ONLY, GL_READ_WRITE};
     glBindImageTexture(unit, texture, level, layer!=-1, layer!=-1?layer:0, gl_access[access], texel_type);
 }
 
@@ -20544,7 +20578,7 @@ void window_hints(unsigned flags) {
     glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 2); // osx, 2:#version150,3:330
     #else
     glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 4);
-    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 5);
     #endif
     #ifdef __APPLE__
         glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); //osx

engine/v4k.h

@@ -2579,6 +2579,29 @@ API void shader_image_unit(unsigned texture, unsigned unit, unsigned level, int
 API void image_write_barrier();
 API void write_barrier();
 
+// ssbo
+enum USAGE_MODE {
+    STATIC_DRAW,
+    STATIC_READ,
+    STATIC_COPY,
+
+    DYNAMIC_DRAW,
+    DYNAMIC_READ,
+    DYNAMIC_COPY,
+
+    STREAM_DRAW,
+    STREAM_READ,
+    STREAM_COPY
+};
+
+API unsigned ssbo_create(const void *data, int len, unsigned usage);
+API void ssbo_destroy(unsigned ssbo);
+API void ssbo_update(int offset, int len, const void *data);
+API void ssbo_bind(unsigned ssbo, unsigned unit);
+API void *ssbo_map(unsigned access);
+API void ssbo_unmap();
+API void ssbo_unbind();
+
 // -----------------------------------------------------------------------------
 // meshes (@fixme: deprecate?)