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Dengine
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Improve performance by swapping render groups 

Last used render groups are brought to front of render list when searching for
valid group- as per- recently used items are likely to be used again.
This commit is contained in:
Doyle Thai 2016-09-23 19:36:18 +10:00
parent 72d30b6320
commit 82421ca64c
3 changed files with 20 additions and 3 deletions
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14
src/Renderer.c
View File

@ -13,6 +13,11 @@
INTERNAL void addVertexToRenderGroup(Renderer *renderer, Texture *tex, v4 color,
Vertex *vertexList, i32 numVertexes)
{
#ifdef DENGINE_DEBUG
ASSERT(numVertexes > 0);
#endif
/* Find vacant/matching render group */
RenderGroup *targetGroup = NULL;
for (i32 i = 0; i < ARRAY_COUNT(renderer->groups); i++)
@ -46,7 +51,13 @@ INTERNAL void addVertexToRenderGroup(Renderer *renderer, Texture *tex, v4 color,
i32 freeVertexSlots = renderer->groupCapacity - group->vertexIndex;
if (numVertexes < freeVertexSlots)
{
targetGroup = &renderer->groups[i];
if (i != 0)
{
RenderGroup tmp = renderer->groups[0];
renderer->groups[0] = renderer->groups[i];
renderer->groups[i] = tmp;
}
targetGroup = &renderer->groups[0];
break;
}
}
@ -289,6 +300,7 @@ void renderer_string(Renderer *const renderer, MemoryArena *arena, Rect camera,
v2 pivotPoint, f32 rotate, v4 color)
{
i32 strLen = common_strlen(string);
if (strLen <= 0) return;
// TODO(doyle): Slightly incorrect string length in pixels calculation,
// because we use the advance metric of each character for length not

2
src/WorldTraveller.c
View File

@ -101,7 +101,7 @@ INTERNAL void rendererInit(GameState *state, v2 windowSize)
GL_CHECK_ERROR();
// TODO(doyle): Lazy allocate render group capacity
renderer->groupCapacity = 1024;
renderer->groupCapacity = 4096;
for (i32 i = 0; i < ARRAY_COUNT(renderer->groups); i++)
{
renderer->groups[i].vertexList =

7
src/dengine.c
View File

@ -224,9 +224,14 @@ i32 main(void)
f32 msPerFrame = secondsElapsed * 1000.0f;
f32 framesPerSecond = 1.0f / secondsElapsed;
i32 entityCount =
worldTraveller.world[worldTraveller.currWorldIndex]
.freeEntityIndex;
char textBuffer[256];
snprintf(textBuffer, ARRAY_COUNT(textBuffer),
"Dengine | %f ms/f | %f fps", msPerFrame, framesPerSecond);
"Dengine | %f ms/f | %f fps | Entity Count: %d",
msPerFrame, framesPerSecond, entityCount);
glfwSetWindowTitle(window, textBuffer);
titleUpdateFrequencyInSeconds = 0.5f;