[client] egl: cache renderer GL state

Track context-local GL bindings to avoid redundant program, framebuffer,
buffer, texture, sampler, viewport, blend, and scissor state changes.

Invalidate the cache across context switches, ImGui rendering, and
shared object changes. Preserve CPU-backed texture upload correctness by
explicitly clearing pixel unpack buffer bindings where required.

This reduces hot-path driver overhead without adding waits or GPU
synchronization.

client/renderers/EGL/texture_dmabuf.c

@@ -20,6 +20,7 @@
 
 #include "texture.h"
 #include "texture_buffer.h"
+#include "state.h"
 #include "util.h"
 
 #include "common/array.h"
@@ -82,7 +83,10 @@ static void egl_texDMABUFCleanup(EGL_Texture * texture)
   egl_texUtilFreeBuffers(parent->buf, parent->texCount);
 
   if (parent->tex[0])
+  {
     glDeleteTextures(parent->texCount, parent->tex);
+    egl_stateInvalidateShared();
+  }
 }
 
 // dmabuf functions
@@ -245,7 +249,7 @@ static bool egl_texDMABUFUpdate(EGL_Texture * texture,
     fdImage->texIndex = slot;
     INTERLOCKED_SECTION(parent->copyLock,
     {
-      glBindTexture(GL_TEXTURE_EXTERNAL_OES, parent->tex[slot]);
+      egl_stateBindTexture(0, GL_TEXTURE_EXTERNAL_OES, parent->tex[slot]);
       glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
       glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
       glTexParameteri(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
@@ -332,7 +336,7 @@ static EGL_TexStatus egl_texDMABUFBind(EGL_Texture * texture)
   if ((status = egl_texDMABUFGet(texture, &tex, NULL)) != EGL_TEX_STATUS_OK)
     return status;
 
-  glBindTexture(GL_TEXTURE_EXTERNAL_OES, tex);
+  egl_stateBindTexture(0, GL_TEXTURE_EXTERNAL_OES, tex);
   return EGL_TEX_STATUS_OK;
 }