Merge pull request #1406 from ReinUsesLisp/multibind-samplers

gl_state: Pack sampler bindings into a single ARB_multi_bind

1 files changed, 21 insertions, 3 deletions

diff --git a/src/video_core/renderer_opengl/gl_state.cpp b/src/video_core/renderer_opengl/gl_state.cpp
index e5173e20a..e494b3f16 100644
--- a/src/video_core/renderer_opengl/gl_state.cpp
+++ b/src/video_core/renderer_opengl/gl_state.cpp
@@ -205,9 +205,6 @@ void OpenGLState::Apply() const {
             glActiveTexture(TextureUnits::MaxwellTexture(static_cast<int>(i)).Enum());
             glBindTexture(texture_unit.target, texture_unit.texture);
         }
-        if (texture_unit.sampler != cur_state_texture_unit.sampler) {
-            glBindSampler(static_cast<GLuint>(i), texture_unit.sampler);
-        }
         // Update the texture swizzle
         if (texture_unit.swizzle.r != cur_state_texture_unit.swizzle.r ||
             texture_unit.swizzle.g != cur_state_texture_unit.swizzle.g ||
@@ -219,6 +216,27 @@ void OpenGLState::Apply() const {
         }
     }
 
+    // Samplers
+    {
+        bool has_delta{};
+        std::size_t first{}, last{};
+        std::array<GLuint, Tegra::Engines::Maxwell3D::Regs::NumTextureSamplers> samplers;
+        for (std::size_t i = 0; i < std::size(samplers); ++i) {
+            samplers[i] = texture_units[i].sampler;
+            if (samplers[i] != cur_state.texture_units[i].sampler) {
+                if (!has_delta) {
+                    first = i;
+                    has_delta = true;
+                }
+                last = i;
+            }
+        }
+        if (has_delta) {
+            glBindSamplers(static_cast<GLuint>(first), static_cast<GLsizei>(last - first + 1),
+                           samplers.data());
+        }
+    }
+
     // Framebuffer
     if (draw.read_framebuffer != cur_state.draw.read_framebuffer) {
         glBindFramebuffer(GL_READ_FRAMEBUFFER, draw.read_framebuffer);