add currentTextureId to be use on rlBegin to define a new draw with the current texture

Author: maiconpintoabreu

src/rlgl.h

@@ -1067,6 +1067,7 @@ typedef struct rlglData {
         Matrix stack[RL_MAX_MATRIX_STACK_SIZE];// Matrix stack for push/pop
         int stackCounter;                   // Matrix stack counter
 
+        unsigned int currentTextureId;      // Current texture id to be used on glBegin
         unsigned int defaultTextureId;      // Default texture used on shapes/poly drawing (required by shader)
         unsigned int activeTextureId[RL_DEFAULT_BATCH_MAX_TEXTURE_UNITS];    // Active texture ids to be enabled on batch drawing (0 active by default)
         unsigned int defaultVShaderId;      // Default vertex shader id (used by default shader program)
@@ -1483,7 +1484,8 @@ void rlBegin(int mode)
         }
 
         if (RLGL.currentBatch->drawCounter >= RL_DEFAULT_BATCH_DRAWCALLS) rlDrawRenderBatch(RLGL.currentBatch);
-
+        RLGL.currentBatch->draws[RLGL.currentBatch->drawCounter - 1].textureId = RLGL.State.currentTextureId;
+        RLGL.State.currentTextureId = RLGL.State.defaultTextureId;
         RLGL.currentBatch->draws[RLGL.currentBatch->drawCounter - 1].mode = mode;
     }
 }
@@ -1656,6 +1658,7 @@ void rlSetTexture(unsigned int id)
 #if defined(GRAPHICS_API_OPENGL_11)
         rlEnableTexture(id);
 #else
+        RLGL.State.currentTextureId = id;
         if (RLGL.currentBatch->draws[RLGL.currentBatch->drawCounter - 1].textureId != id)
         {
             if (RLGL.currentBatch->draws[RLGL.currentBatch->drawCounter - 1].vertexCount > 0)
@@ -2258,6 +2261,7 @@ void rlglInit(int width, int height)
     // Init default white texture
     unsigned char pixels[4] = { 255, 255, 255, 255 };   // 1 pixel RGBA (4 bytes)
     RLGL.State.defaultTextureId = rlLoadTexture(pixels, 1, 1, RL_PIXELFORMAT_UNCOMPRESSED_R8G8B8A8, 1);
+    RLGL.State.currentTextureId = RLGL.State.defaultTextureId;
 
     if (RLGL.State.defaultTextureId != 0) TRACELOG(RL_LOG_INFO, "TEXTURE: [ID %i] Default texture loaded successfully", RLGL.State.defaultTextureId);
     else TRACELOG(RL_LOG_WARNING, "TEXTURE: Failed to load default texture");