Add support for depth & stencil buffers

1 files changed, 89 insertions, 21 deletions

diff --git a/src/rendering.c b/src/rendering.c
index 88b1b9c..3faf91c 100644
--- a/src/rendering.c
+++ b/src/rendering.c
@@ -719,28 +719,35 @@ void r_destroy_framebuffers(void* restrict ctx, u32* restrict framebuffer_array,
   gl->DeleteFramebuffers(num_targets, framebuffer_array);
 }
 
+static u32 gl_texture_format(u32 texture_format) {
+  switch (texture_format) {
+    case BUFFERPARAMETER_FMT_RGBA8: return GL_RGBA8;
+    case BUFFERPARAMETER_FMT_SRGB8: return GL_SRGB;
+    case BUFFERPARAMETER_FMT_SRGBA8: return GL_SRGB8_ALPHA8;
+
+    case BUFFERPARAMETER_FMT_DEPTH24_STENCIL8: return GL_DEPTH24_STENCIL8;
+    case BUFFERPARAMETER_FMT_DEPTH16: return GL_DEPTH_COMPONENT16;
+    case BUFFERPARAMETER_FMT_DEPTH24: return GL_DEPTH_COMPONENT24;
+    case BUFFERPARAMETER_FMT_DEPTH32: return GL_DEPTH_COMPONENT32;
+    case BUFFERPARAMETER_FMT_DEPTH32F: return  GL_DEPTH_COMPONENT32F;
+    case BUFFERPARAMETER_FMT_STENCIL8: return GL_STENCIL_INDEX8;
+
+    default:
+      ERROR("Failed to convert format to GL internal format!");
+      exit(EXIT_FAILURE);
+  }
+}
+
 void r_create_textures(void* restrict ctx, u32* restrict texture_array,
                        u32* restrict texture_parameters,
                        ivec3* restrict texture_size, usize num_targets) {
   const GladGLContext* gl = (GladGLContext*)ctx;
 
   u32 texture_dim = BUFFERPARAMETER_TEXTURE_GET_DIMENSION(texture_parameters[0]);
-  u32 texture_format = BUFFERPARAMETER_TEXTURE_GET_FORMAT(texture_parameters[0]);
-  u32 gl_texture_format;
   u32 err;
 
   for (usize i = 1; i < num_targets; i++) {
     ASSERT(texture_dim == BUFFERPARAMETER_TEXTURE_GET_DIMENSION(texture_parameters[i]));
-    ASSERT(texture_format == BUFFERPARAMETER_TEXTURE_GET_FORMAT(texture_parameters[i]));
-  }
-
-  switch (texture_format) {
-    case BUFFERPARAMETER_TEXTURE_FMT_RGBA8: gl_texture_format = GL_RGBA8; break;
-    case BUFFERPARAMETER_TEXTURE_FMT_SRGB8: gl_texture_format = GL_SRGB; break;
-    case BUFFERPARAMETER_TEXTURE_FMT_SRGBA8: gl_texture_format = GL_SRGB8_ALPHA8; break;
-    default:
-      ERROR("Failed to convert format to GL internal format!");
-      exit(EXIT_FAILURE);
   }
 
   // Convert the texturetype to GL texturetype
@@ -749,7 +756,7 @@ void r_create_textures(void* restrict ctx, u32* restrict texture_array,
       gl->CreateTextures(GL_TEXTURE_1D, num_targets, texture_array);
       ASSERT(!gl->GetError());
       for (usize i = 0; i < num_targets; i++) {
-        gl->TextureStorage1D(texture_array[i], 1, gl_texture_format, (*texture_size)[0]);
+        gl->TextureStorage1D(texture_array[i], 1, gl_texture_format(BUFFERPARAMETER_TEXTURE_GET_FORMAT(texture_parameters[i])), (*texture_size)[0]);
       }
       break;
 
@@ -757,7 +764,7 @@ void r_create_textures(void* restrict ctx, u32* restrict texture_array,
       gl->CreateTextures(GL_TEXTURE_2D, num_targets, texture_array);
       ASSERT(!gl->GetError());
       for (usize i = 0; i < num_targets; i++) {
-        gl->TextureStorage2D(texture_array[i], 1, gl_texture_format, (*texture_size)[0], (*texture_size)[1]);
+        gl->TextureStorage2D(texture_array[i], 1, gl_texture_format(BUFFERPARAMETER_TEXTURE_GET_FORMAT(texture_parameters[i])), (*texture_size)[0], (*texture_size)[1]);
       }
       break;
 
@@ -765,7 +772,7 @@ void r_create_textures(void* restrict ctx, u32* restrict texture_array,
       gl->CreateTextures(GL_TEXTURE_3D, num_targets, texture_array);
       ASSERT(!gl->GetError());
       for (usize i = 0; i < num_targets; i++) {
-        gl->TextureStorage3D(texture_array[i], 1, gl_texture_format, (*texture_size)[0], (*texture_size)[1], (*texture_size)[2]);
+        gl->TextureStorage3D(texture_array[i], 1, gl_texture_format(BUFFERPARAMETER_TEXTURE_GET_FORMAT(texture_parameters[i])), (*texture_size)[0], (*texture_size)[1], (*texture_size)[2]);
       }
       break;
 
@@ -814,18 +821,79 @@ void r_destroy_textures(void *restrict ctx, u32* textures, usize num_textures) {
   gl->DeleteTextures(num_textures, textures);
 }
 
+// I know there's a "size too many", but it is included for easier
+// interopability with r_create_textures
+void r_create_renderbuffers(void *restrict ctx, u32* restrict buffer_array, u32* restrict buffer_types, ivec3* restrict buffer_sizes, usize num_buffers) {
+  GladGLContext *restrict gl = (GladGLContext*)ctx;
+
+  gl->CreateRenderbuffers(num_buffers, buffer_array);
+  for (usize i = 0; i < num_buffers; i++) {
+    gl->NamedRenderbufferStorage(
+        buffer_array[i],
+        gl_texture_format(BUFFERPARAMETER_RENDERBUFFER_GET_FORMAT(buffer_types[i])),
+        buffer_sizes[i][0],
+        buffer_sizes[i][1]
+    );
+  }
+
+}
+
+void r_destroy_renderbuffers(void *restrict ctx, u32* buffers, usize num_buffers) {
+  ((GladGLContext *restrict)ctx)->DeleteRenderbuffers(num_buffers, buffers);
+}
+
+static u32 gl_renderbuffer_type(u32 buffer_param) {
+  switch (BUFFERPARAMETER_RENDERBUFFER_GET_TYPE(buffer_param)) {
+    case BUFFERPARAMETER_RENDERBUFFER_DEPTH:
+      return GL_DEPTH_ATTACHMENT;
+    case BUFFERPARAMETER_RENDERBUFFER_STENCIL:
+      return GL_STENCIL_ATTACHMENT;
+    case (BUFFERPARAMETER_RENDERBUFFER_DEPTH | BUFFERPARAMETER_RENDERBUFFER_STENCIL):
+      return GL_DEPTH_STENCIL_ATTACHMENT;
+    default:
+      UNIMPLEMENTED;
+  }
+  return -1;
+}
+
 void r_attach_buffers(void *restrict ctx, u32 fbo, u32* buffers, u32* buffer_parameters, i32 num_buffers) {
   const GladGLContext *restrict gl = (GladGLContext*)ctx;
 
+  DEBUG("Attaching to FBO %d\n", fbo);
+
   u32 err;
 
   for (i32 i = 0; i < num_buffers; i++) {
-    BufferType t = BUFFERPARAMETER_GET_TYPE(buffer_parameters[i]);
-
-    if (t != BufferType_texture) UNIMPLEMENTED;
-
-    // TODO: FINISH ME
-    gl->NamedFramebufferTexture(fbo, GL_COLOR_ATTACHMENT0 + i, buffers[i], 0);
+    switch (BUFFERPARAMETER_GET_TYPE(buffer_parameters[i])) {
+      case BufferType_frame:
+        UNIMPLEMENTED;
+      case BufferType_texture:
+        switch (BUFFERPARAMETER_TEXTURE_GET_FORMAT(buffer_parameters[i])) {
+          case BUFFERPARAMETER_FMT_DEPTH24_STENCIL8:
+            gl->NamedFramebufferTexture(fbo, GL_DEPTH_STENCIL_ATTACHMENT, buffers[i], 0);
+            break;
+          case BUFFERPARAMETER_FMT_DEPTH16:
+          case BUFFERPARAMETER_FMT_DEPTH24:
+          case BUFFERPARAMETER_FMT_DEPTH32:
+          case BUFFERPARAMETER_FMT_DEPTH32F:
+            gl->NamedFramebufferTexture(fbo, GL_DEPTH_ATTACHMENT, buffers[i], 0);
+            break;
+          case BUFFERPARAMETER_FMT_STENCIL8:
+            gl->NamedFramebufferTexture(fbo, GL_STENCIL_ATTACHMENT, buffers[i], 0);
+            break;
+          default:
+            gl->NamedFramebufferTexture(fbo, GL_COLOR_ATTACHMENT0 + i, buffers[i], 0);
+            break;
+        }
+        break;
+      case BufferType_render:
+        gl->NamedFramebufferRenderbuffer(fbo, gl_renderbuffer_type(buffer_parameters[i]), GL_RENDERBUFFER, buffers[i]);
+        break;
+      case BufferType_buffer:
+        UNIMPLEMENTED;
+      default:
+        UNIMPLEMENTED;
+    }
 
     err = gl->GetError();
     if (err) {