GPU: Remove leftovers from hardware tessellation

The GLES sampler uniforms and texture slots for the control points and
weights, the Vulkan storage buffer bindings, and the u_spline_counts
uniform, which becomes padding (the C++ side already was).

Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>

GPU/Common/DrawEngineCommon.h

@@ -50,9 +50,6 @@ enum {
 	TEX_SLOT_SHADERBLEND_SRC = 1,
 	TEX_SLOT_ALPHATEST = 2,
 	TEX_SLOT_CLUT = 3,
-	TEX_SLOT_SPLINE_POINTS = 4,
-	TEX_SLOT_SPLINE_WEIGHTS_U = 5,
-	TEX_SLOT_SPLINE_WEIGHTS_V = 6,
 };
 
 enum FBOTexState {

GPU/Common/ShaderUniforms.h

@@ -58,7 +58,7 @@ R"(  mat4 u_proj;
   vec2 u_rasterOffset; vec2 u_minZmaxZ;
   vec4 u_uvscaleoffset;
   vec4 u_matambientalpha;
-  uint u_spline_counts;
+  uint pad0;
   uint u_depal_mask_shift_off_fmt;
   uint u_colorWriteMask;
   float u_mipBias;

GPU/GLES/ShaderManagerGLES.cpp

@@ -170,12 +170,6 @@ LinkedShader::LinkedShader(GLRenderManager *render, VShaderID VSID, Shader *vs,
 		queries.push_back({ &u_lightspecular[i], lightspecular_names[i] });
 	}
 
-	// We need to fetch these unconditionally, gstate_c.spline or bezier will not be set if we
-	// create this shader at load time from the shader cache.
-	queries.push_back({ &u_tess_points, "u_tess_points" });
-	queries.push_back({ &u_tess_weights_u, "u_tess_weights_u" });
-	queries.push_back({ &u_tess_weights_v, "u_tess_weights_v" });
-	queries.push_back({ &u_spline_counts, "u_spline_counts" });
 	queries.push_back({ &u_depal_mask_shift_off_fmt, "u_depal_mask_shift_off_fmt" });
 	queries.push_back({ &u_mipBias, "u_mipBias" });
 
@@ -183,14 +177,11 @@ LinkedShader::LinkedShader(GLRenderManager *render, VShaderID VSID, Shader *vs,
 	availableUniforms = vs->GetUniformMask() | fs->GetUniformMask();
 
 	std::vector<GLRProgram::Initializer> initialize;
-	initialize.reserve(7);
+	initialize.reserve(4);
 	initialize.push_back({ &u_tex,          0, TEX_SLOT_PSP_TEXTURE });
 	initialize.push_back({ &u_fbotex,       0, TEX_SLOT_SHADERBLEND_SRC });
 	initialize.push_back({ &u_testtex,      0, TEX_SLOT_ALPHATEST });
 	initialize.push_back({ &u_pal,          0, TEX_SLOT_CLUT }); // CLUT
-	initialize.push_back({ &u_tess_points,  0, TEX_SLOT_SPLINE_POINTS }); // Control Points
-	initialize.push_back({ &u_tess_weights_u, 0, TEX_SLOT_SPLINE_WEIGHTS_U });
-	initialize.push_back({ &u_tess_weights_v, 0, TEX_SLOT_SPLINE_WEIGHTS_V });
 
 	GLRProgramFlags flags{};
 	flags.supportDualSource = gstate_c.Use(GPU_USE_DUALSOURCE_BLEND);

GPU/GLES/ShaderManagerGLES.h

@@ -122,12 +122,6 @@ public:
 	int u_lightdiffuse[4];  // each light consist of vec4[3]
 	int u_lightspecular[4];  // attenuation
 	int u_lightambient[4];  // attenuation
-
-	// Spline Tessellation
-	int u_tess_points; // Control Points
-	int u_tess_weights_u;
-	int u_tess_weights_v;
-	int u_spline_counts;
 };
 
 // Real public interface

GPU/Vulkan/DrawEngineVulkan.h

@@ -69,10 +69,7 @@ enum {
 	DRAW_BINDING_DYNUBO_BASE = 3,
 	DRAW_BINDING_DYNUBO_LIGHT = 4,
 	DRAW_BINDING_DYNUBO_BONE = 5,
-	DRAW_BINDING_TESS_STORAGE_BUF = 6,
-	DRAW_BINDING_TESS_STORAGE_BUF_WU = 7,
-	DRAW_BINDING_TESS_STORAGE_BUF_WV = 8,
-	DRAW_BINDING_COUNT = 9,
+	DRAW_BINDING_COUNT = 6,
 };
 
 // Handles transform, lighting and drawing.