Buffer orphaning and subrange update optims.

__init__.py

@@ -279,6 +279,9 @@ INSTANCE_FLAG_VISIBLE = _flag(1)
 BATCH_MAX_SIZE = 65536
 
 render_initialize = _engine.rk_render_initialize
+render_initialize.argtypes = (
+    ctypes.c_bool,) # debug
+
 render_terminate = _engine.rk_render_terminate
 
 _load_shader = _engine.rk_load_shader

cpp/render.hpp

@@ -80,7 +80,8 @@ union rk_mesh {
     };
 };
 
-RK_EXPORT void rk_render_initialize();
+RK_EXPORT void rk_render_initialize(
+    rk_bool debug);
 
 RK_EXPORT void rk_render_terminate();
 

cpp/render/render_opengles.cpp

@@ -17,7 +17,6 @@
 #include "render_opengles.hpp"
 #include "../display/display_glx.hpp"
 #include <cstdio>
-#include <cstring>
 
 typedef void (*rk_DrawElementsInstancedBaseInstanceFunc)(rk_uint, rk_uint, rk_uint, const void *, rk_uint, rk_uint);
 typedef void (*rk_MultiDrawElementsIndirectFunc)(rk_uint, rk_uint, const void *, rk_uint, rk_uint);
@@ -49,7 +48,8 @@ static void rk_debug_message_callback(
     printf("[GL] (id=%d) %s\n", id, message);
 }
 
-void rk_render_initialize() {
+void rk_render_initialize(
+    rk_bool debug) {
     GLubyte const * const vendor = glGetString(GL_VENDOR);
     GLubyte const * const renderer = glGetString(GL_RENDERER);
     printf("[GL] vendor: %s, renderer: %s\n", vendor, renderer);
@@ -57,8 +57,10 @@ void rk_render_initialize() {
     GLubyte const * const language = glGetString(GL_SHADING_LANGUAGE_VERSION);
     printf("[GL] version: %s, language: %s\n", version, language);
 
+    if (debug) {
         glDebugMessageCallback(rk_debug_message_callback, nullptr);
         glEnable(GL_DEBUG_OUTPUT);
+    }
 
     char const * const gl_exts = reinterpret_cast<char const *>(glGetString(GL_EXTENSIONS));
     // printf("[GL] %s\n", gl_exts);
@@ -373,6 +375,7 @@ static void rk_pack_vec3_short(
         dst->x = static_cast<rk_short>(input.x);
         dst->y = static_cast<rk_short>(input.y);
         dst->z = static_cast<rk_short>(input.z);
+        dst->pad = 0;
     }
 }
 
@@ -390,6 +393,7 @@ static void rk_pack_vec3_short_norm(
         dst->x = _convert(input.x);
         dst->y = _convert(input.y);
         dst->z = _convert(input.z);
+        dst->pad = 0;
     }
     #undef _convert
 }
@@ -493,18 +497,19 @@ rk_batch_t rk_create_batch(
     rk_batch * batch = new rk_batch;
     batch->max_size = max_size;
     batch->nparams = nparams;
+    batch->commands_size = 0;
+    batch->packed_size = 0;
     batch->indices = nullptr;
     batch->commands = nullptr;
     batch->params = nullptr;
-    batch->packed_params = nullptr;
+    batch->commands_buffer = 0;
-    batch->indirect_buffer = 0;
     batch->params_array = 0;
-    unsigned params_size = 0;
+    unsigned packed_size = 0;
     if (nparams) {
         batch->params = new rk_parameter[nparams];
         rk_parameter * param = batch->params;
         for (rk_param_format const * f = params_format; *f; ++f, ++param) {
-            param->offset = params_size;
+            param->offset = packed_size;
             bool const norm = (*f & RK_PARAM_FORMAT_NORMALIZE) != 0;
             switch (*f & RK_PARAM_FORMAT_MASK) {
                 case RK_PARAM_FORMAT_VEC3_FLOAT:
@@ -534,26 +539,25 @@ rk_batch_t rk_create_batch(
                     return nullptr;
                     break;
             }
-            params_size += max_size * param->size;
+            packed_size += max_size * param->size;
         }
     }
+    batch->commands_size = max_size * sizeof(rk_command);
+    batch->packed_size = packed_size;
     batch->indices = new rk_ushort[max_size];
     batch->commands = new rk_command[max_size];
-    memset(batch->commands, 0, max_size * sizeof(rk_command));
+    memset(batch->commands, 0, batch->commands_size);
-    batch->indirect_buffer = 0;
     if (rk_MultiDrawElementsIndirect) {
-        glGenBuffers(1, &batch->indirect_buffer);
+        glGenBuffers(1, &batch->commands_buffer);
-        glBindBuffer(GL_DRAW_INDIRECT_BUFFER, batch->indirect_buffer);
+        glBindBuffer(GL_DRAW_INDIRECT_BUFFER, batch->commands_buffer);
-        glBufferData(GL_DRAW_INDIRECT_BUFFER, max_size * sizeof(rk_command), nullptr, GL_DYNAMIC_DRAW);
+        glBufferData(GL_DRAW_INDIRECT_BUFFER, batch->commands_size, nullptr, GL_STREAM_DRAW);
         glBindBuffer(GL_DRAW_INDIRECT_BUFFER, 0);
     }
     if (nparams) {
-        batch->packed_params = new rk_ubyte[params_size];
-        memset(batch->packed_params, 0, params_size);
         glBindVertexArray(vertices->array);
         glGenBuffers(1, &batch->params_array);
         glBindBuffer(GL_ARRAY_BUFFER, batch->params_array);
-        glBufferData(GL_ARRAY_BUFFER, params_size, nullptr, GL_DYNAMIC_DRAW);
+        glBufferData(GL_ARRAY_BUFFER, batch->packed_size, nullptr, GL_STREAM_DRAW);
         glBindBuffer(GL_ARRAY_BUFFER, 0);
         rk_parameter const * param = batch->params;
         unsigned binding = RK_PARAMS_BINDING_BASE;
@@ -746,6 +750,7 @@ static unsigned rk_batch_build_commands(
         commands->nvertices = static_cast<GLuint>(mesh.ntriangles) * 3;
         commands->ninstances = first - base;
         commands->base_index = mesh.base_index;
+        commands->base_vertex = 0;
         commands->base_instance = base - batch.indices;
     }
     return commands - batch.commands;
@@ -759,9 +764,13 @@ static void rk_batch_pack(
     for (rk_parameter const * param = batch.params; param < last_param; ++param) {
         rk_ubyte const * const src = *srcs++;
         if (src) {
-            rk_ubyte * const dst = batch.packed_params + param->offset;
+            rk_ubyte * const dst = reinterpret_cast<rk_ubyte *>(
+                glMapBufferRange(GL_ARRAY_BUFFER, param->offset, ninstances * param->size,
+                    GL_MAP_WRITE_BIT | GL_MAP_INVALIDATE_RANGE_BIT | GL_MAP_UNSYNCHRONIZED_BIT));
+            if (dst) {
                 param->packer(ninstances, batch.indices, dst, src);
-            glBufferSubData(GL_ARRAY_BUFFER, param->offset, ninstances * param->size, dst);
+                glUnmapBuffer(GL_ARRAY_BUFFER);
+            }
         }
     }
 }
@@ -782,11 +791,13 @@ void rk_draw_batch(
     }
     unsigned const ncommands = rk_batch_build_commands(batch, ninstances, meshes);
     if (rk_MultiDrawElementsIndirect) {
-        glBindBuffer(GL_DRAW_INDIRECT_BUFFER, batch.indirect_buffer);
+        glBindBuffer(GL_DRAW_INDIRECT_BUFFER, batch.commands_buffer);
+        glBufferData(GL_DRAW_INDIRECT_BUFFER, batch.commands_size, nullptr, GL_STREAM_DRAW);
         glBufferSubData(GL_DRAW_INDIRECT_BUFFER, 0, ncommands * sizeof(rk_command), batch.commands);
     }
     if (batch.nparams && params) {
         glBindBuffer(GL_ARRAY_BUFFER, batch.params_array);
+        glBufferData(GL_ARRAY_BUFFER, batch.packed_size, nullptr, GL_STREAM_DRAW);
         rk_batch_pack(batch, ninstances, params);
     }
     if (rk_DrawElementsInstancedBaseInstance) {
@@ -862,11 +873,10 @@ void rk_destroy_batch(
         delete[] batch->indices;
         delete[] batch->commands;
         if (rk_MultiDrawElementsIndirect) {
-            glDeleteBuffers(1, &batch->indirect_buffer);
+            glDeleteBuffers(1, &batch->commands_buffer);
         }
         if (batch->nparams) {
             delete[] batch->params;
-            delete[] batch->packed_params;
             glDeleteBuffers(1, &batch->params_array);
         }
         delete batch;

cpp/render/render_opengles.hpp

@@ -102,11 +102,12 @@ struct rk_parameter {
 struct rk_batch {
     unsigned max_size;
     unsigned nparams;
+    unsigned commands_size;
+    unsigned packed_size;
     rk_ushort * indices;
     rk_command * commands;
     rk_parameter * params;
-    rk_ubyte * packed_params;
+    GLuint commands_buffer;
-    GLuint indirect_buffer;
     GLuint params_array;
 };