-textureUnitBucket

1 files changed, 13 insertions, 15 deletions

diff --git a/Runtime/Graphics/GfxDevice.cpp b/Runtime/Graphics/GfxDevice.cpp
index e172756..f83a9b4 100644
--- a/Runtime/Graphics/GfxDevice.cpp
+++ b/Runtime/Graphics/GfxDevice.cpp
@@ -3,9 +3,19 @@
 #include "Runtime/Math/Math.h"
 
 static bool deviceInited = false;
+//
+//static const std::vector<byte> s_AvailableTextureUnitPreset = {0,1,2,3,4,5,6,7}; // 最多支持8个贴图
+//static std::vector<byte> s_TextureUnitBucket = s_AvailableTextureUnitPreset;
 
-static const std::vector<byte> s_AvailableTextureUnitPreset = {0,1,2,3,4,5,6,7}; // 最多支持8个贴图
-static std::vector<byte> s_TextureUnitBucket = s_AvailableTextureUnitPreset;
+static const int kMaxAvailableTextureUnitCount = 8; // 最多支持8个贴图
+static int s_CurAvailableTextureUnit = 0;
+
+static int ClaimTextureUnit()
+{
+    int unit = s_CurAvailableTextureUnit;
+    s_CurAvailableTextureUnit = (s_CurAvailableTextureUnit + 1) % kMaxAvailableTextureUnitCount;
+    return unit;
+}
 
 GfxDevice g_GfxDevice;
 
@@ -129,14 +139,7 @@ void GfxDevice::SetUniformMat4(const char* name, Matrix44 mat4)
 
 void GfxDevice::SetUniformTexture(const char* name, Texture* texture)
 {
-    if (s_TextureUnitBucket.size() == 0)
-    {
-        log_error("No available texture unit. Too many textures or forget invoke ResetUniformsState()");
-        return;
-    }
-
-    int texUnit = s_TextureUnitBucket.back();
-    s_TextureUnitBucket.pop_back();
+    int texUnit = ClaimTextureUnit();
     glActiveTexture(GL_TEXTURE0 + texUnit);

 	glBindTexture(GL_TEXTURE_2D, texture->GetGpuID());

 

@@ -144,11 +147,6 @@ void GfxDevice::SetUniformTexture(const char* name, Texture* texture)
     glUniform1i(loc, texUnit);
 }
 
-void GfxDevice::ResetUniformsState()
-{
-    s_TextureUnitBucket = s_AvailableTextureUnitPreset;
-}
-
 void GfxDevice::BeginFrame()
 {
 	m_IsInsideFrame = true;