Diff vao, vbo, and ibo;

src/graphics/graphics.c

@@ -468,8 +468,8 @@ static void lovrGraphicsDrawPrimitive(GLenum mode, int hasNormals, int hasTexCoo
   unsigned int* indices = state.buffer.indices.data;
 
   lovrGraphicsPrepare();
-  glBindVertexArray(state.buffer.vao);
+  lovrGraphicsBindVertexArray(state.buffer.vao);
-  glBindBuffer(GL_ARRAY_BUFFER, state.buffer.vbo);
+  lovrGraphicsBindVertexBuffer(state.buffer.vbo);
   glBufferData(GL_ARRAY_BUFFER, state.buffer.data.length * sizeof(float), data, GL_STREAM_DRAW);
   glEnableVertexAttribArray(LOVR_SHADER_POSITION);
   glVertexAttribPointer(LOVR_SHADER_POSITION, 3, GL_FLOAT, GL_FALSE, strideBytes, (void*) 0);
@@ -490,14 +490,12 @@ static void lovrGraphicsDrawPrimitive(GLenum mode, int hasNormals, int hasTexCoo
   }
 
   if (useIndices) {
-    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, state.buffer.ibo);
+    lovrGraphicsBindIndexBuffer(state.buffer.ibo);
     glBufferData(GL_ELEMENT_ARRAY_BUFFER, state.buffer.indices.length * sizeof(unsigned int), indices, GL_STREAM_DRAW);
     glDrawElements(mode, state.buffer.indices.length, GL_UNSIGNED_INT, NULL);
   } else {
     glDrawArrays(mode, 0, state.buffer.data.length / stride);
   }
-
-  glBindVertexArray(0);
 }
 
 void lovrGraphicsPoints(float* points, int count) {
@@ -983,3 +981,25 @@ void lovrGraphicsPrint(const char* str, mat4 transform, float wrap, HorizontalAl
     lovrRelease(&lastShader->ref);
   }
 }
+
+// Internal State
+void lovrGraphicsBindVertexArray(uint32_t vertexArray) {
+  if (state.vertexArray != vertexArray) {
+    state.vertexArray = vertexArray;
+    glBindVertexArray(vertexArray);
+  }
+}
+
+void lovrGraphicsBindVertexBuffer(uint32_t vertexBuffer) {
+  if (state.vertexBuffer != vertexBuffer) {
+    state.vertexBuffer = vertexBuffer;
+    glBindBuffer(GL_ARRAY_BUFFER, vertexBuffer);
+  }
+}
+
+void lovrGraphicsBindIndexBuffer(uint32_t indexBuffer) {
+  if (state.indexBuffer != indexBuffer) {
+    state.indexBuffer = indexBuffer;
+    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, indexBuffer);
+  }
+}

src/graphics/graphics.h

@@ -77,14 +77,6 @@ typedef struct {
   int transform;
   int canvas;
 
-  struct {
-    GLuint vao;
-    GLuint vbo;
-    GLuint ibo;
-    vec_float_t data;
-    vec_uint_t indices;
-  } buffer;
-
   Color backgroundColor;
   BlendMode blendMode;
   BlendAlphaMode blendAlphaMode;
@@ -99,6 +91,18 @@ typedef struct {
   Shader* shader;
   Winding winding;
   int wireframe;
+
+  struct {
+    GLuint vao;
+    GLuint vbo;
+    GLuint ibo;
+    vec_float_t data;
+    vec_uint_t indices;
+  } buffer;
+
+  uint32_t vertexArray;
+  uint32_t vertexBuffer;
+  uint32_t indexBuffer;
 } GraphicsState;
 
 // Base
@@ -166,3 +170,8 @@ void lovrGraphicsCylinder(float x1, float y1, float z1, float x2, float y2, floa
 void lovrGraphicsSphere(Texture* texture, mat4 transform, int segments);
 void lovrGraphicsSkybox(Skybox* skybox, float angle, float ax, float ay, float az);
 void lovrGraphicsPrint(const char* str, mat4 transform, float wrap, HorizontalAlign halign, VerticalAlign valign);
+
+// Internal State
+void lovrGraphicsBindVertexArray(uint32_t vao);
+void lovrGraphicsBindVertexBuffer(uint32_t vbo);
+void lovrGraphicsBindIndexBuffer(uint32_t ibo);

src/graphics/mesh.c

@@ -9,7 +9,7 @@ static void lovrMeshBindAttributes(Mesh* mesh) {
     return;
   }
 
-  glBindBuffer(GL_ARRAY_BUFFER, mesh->vbo);
+  lovrGraphicsBindVertexBuffer(mesh->vbo);
 
   size_t offset = 0;
   int i;
@@ -87,7 +87,7 @@ Mesh* lovrMeshCreate(size_t count, MeshFormat* format, MeshDrawMode drawMode, Me
 
   glGenBuffers(1, &mesh->vbo);
   glGenBuffers(1, &mesh->ibo);
-  glBindBuffer(GL_ARRAY_BUFFER, mesh->vbo);
+  lovrGraphicsBindVertexBuffer(mesh->vbo);
   glBufferData(GL_ARRAY_BUFFER, mesh->count * mesh->stride, NULL, mesh->usage);
   glGenVertexArrays(1, &mesh->vao);
 
@@ -123,12 +123,12 @@ void lovrMeshDraw(Mesh* mesh, mat4 transform) {
   lovrGraphicsMatrixTransform(transform);
   lovrGraphicsBindTexture(mesh->texture);
   lovrGraphicsPrepare();
-  glBindVertexArray(mesh->vao);
+  lovrGraphicsBindVertexArray(mesh->vao);
   lovrMeshBindAttributes(mesh);
   size_t start = mesh->rangeStart;
   size_t count = mesh->rangeCount;
   if (mesh->map.length > 0) {
-    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, mesh->ibo);
+    lovrGraphicsBindIndexBuffer(mesh->ibo);
     glDrawElements(mesh->drawMode, mesh->map.length, GL_UNSIGNED_INT, (GLvoid*) start);
   } else {
     glDrawArrays(mesh->drawMode, start, count);
@@ -168,7 +168,7 @@ void lovrMeshSetVertexMap(Mesh* mesh, unsigned int* map, size_t count) {
   } else {
     vec_clear(&mesh->map);
     vec_pusharr(&mesh->map, map, count);
-    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, mesh->ibo);
+    lovrGraphicsBindIndexBuffer(mesh->ibo);
     glBufferData(GL_ELEMENT_ARRAY_BUFFER, count * sizeof(unsigned int), mesh->map.data, GL_STATIC_DRAW);
   }
 }
@@ -268,7 +268,7 @@ void* lovrMeshMap(Mesh* mesh, int start, size_t count, int read, int write) {
   access |= read ? GL_MAP_READ_BIT : 0;
   access |= write ? GL_MAP_WRITE_BIT : 0;
   access |= (write && start == 0 && count == mesh->count) ? GL_MAP_INVALIDATE_BUFFER_BIT : 0;
-  glBindBuffer(GL_ARRAY_BUFFER, mesh->vbo);
+  lovrGraphicsBindVertexBuffer(mesh->vbo);
   return glMapBufferRange(GL_ARRAY_BUFFER, start * mesh->stride, count * mesh->stride, access);
 #endif
 }
@@ -279,7 +279,7 @@ void lovrMeshUnmap(Mesh* mesh) {
   }
 
   mesh->isMapped = 0;
-  glBindBuffer(GL_ARRAY_BUFFER, mesh->vbo);
+  lovrGraphicsBindVertexBuffer(mesh->vbo);
 
 #ifdef EMSCRIPTEN
   int start = mesh->mapStart * mesh->stride;