Merge pull request #2743 from wwylele/wrap-fix

pica/rasterizer: implement/stub texture wrap mode 4-7

src/video_core/regs_texturing.h

@@ -30,10 +30,10 @@ struct TexturingRegs {
             Repeat = 2,
             MirroredRepeat = 3,
             // Mode 4-7 produces some weird result and may be just invalid:
-            // 4: Positive coord: clamp to edge; negative coord: repeat
-            // 5: Positive coord: clamp to border; negative coord: repeat
-            // 6: Repeat
-            // 7: Repeat
+            ClampToEdge2 = 4,   // Positive coord: clamp to edge; negative coord: repeat
+            ClampToBorder2 = 5, // Positive coord: clamp to border; negative coord: repeat
+            Repeat2 = 6,        // Same as Repeat
+            Repeat3 = 7,        // Same as Repeat
         };
 
         enum TextureFilter : u32 {

src/video_core/renderer_opengl/pica_to_gl.h

@@ -55,6 +55,12 @@ inline GLenum WrapMode(Pica::TexturingRegs::TextureConfig::WrapMode mode) {
         GL_CLAMP_TO_BORDER, // WrapMode::ClampToBorder
         GL_REPEAT,          // WrapMode::Repeat
         GL_MIRRORED_REPEAT, // WrapMode::MirroredRepeat
+        // TODO(wwylele): ClampToEdge2 and ClampToBorder2 are not properly implemented here. See the
+        // comments in enum WrapMode.
+        GL_CLAMP_TO_EDGE,   // WrapMode::ClampToEdge2
+        GL_CLAMP_TO_BORDER, // WrapMode::ClampToBorder2
+        GL_REPEAT,          // WrapMode::Repeat2
+        GL_REPEAT,          // WrapMode::Repeat3
     };
 
     // Range check table for input
@@ -65,6 +71,13 @@ inline GLenum WrapMode(Pica::TexturingRegs::TextureConfig::WrapMode mode) {
         return GL_CLAMP_TO_EDGE;
     }
 
+    if (static_cast<u32>(mode) > 3) {
+        // It is still unclear whether mode 4-7 are valid, so log it if a game uses them.
+        // TODO(wwylele): telemetry should be added here so we can collect more info about which
+        // game uses this.
+        LOG_WARNING(Render_OpenGL, "Using texture wrap mode %u", static_cast<u32>(mode));
+    }
+
     GLenum gl_mode = wrap_mode_table[mode];
 
     // Check for dummy values indicating an unknown mode

src/video_core/swrasterizer/rasterizer.cpp

@@ -357,10 +357,22 @@ static void ProcessTriangleInternal(const Vertex& v0, const Vertex& v1, const Ve
                 int t = (int)(v * float24::FromFloat32(static_cast<float>(texture.config.height)))
                             .ToFloat32();
 
-                if ((texture.config.wrap_s == TexturingRegs::TextureConfig::ClampToBorder &&
-                     (s < 0 || static_cast<u32>(s) >= texture.config.width)) ||
-                    (texture.config.wrap_t == TexturingRegs::TextureConfig::ClampToBorder &&
-                     (t < 0 || static_cast<u32>(t) >= texture.config.height))) {
+                bool use_border_s = false;
+                bool use_border_t = false;
+
+                if (texture.config.wrap_s == TexturingRegs::TextureConfig::ClampToBorder) {
+                    use_border_s = s < 0 || s >= static_cast<int>(texture.config.width);
+                } else if (texture.config.wrap_s == TexturingRegs::TextureConfig::ClampToBorder2) {
+                    use_border_s = s >= static_cast<int>(texture.config.width);
+                }
+
+                if (texture.config.wrap_t == TexturingRegs::TextureConfig::ClampToBorder) {
+                    use_border_t = t < 0 || t >= static_cast<int>(texture.config.height);
+                } else if (texture.config.wrap_t == TexturingRegs::TextureConfig::ClampToBorder2) {
+                    use_border_t = t >= static_cast<int>(texture.config.height);
+                }
+
+                if (use_border_s || use_border_t) {
                     auto border_color = texture.config.border_color;
                     texture_color[i] = {border_color.r, border_color.g, border_color.b,
                                         border_color.a};

src/video_core/swrasterizer/texturing.cpp

@@ -18,22 +18,33 @@ using TevStageConfig = TexturingRegs::TevStageConfig;
 
 int GetWrappedTexCoord(TexturingRegs::TextureConfig::WrapMode mode, int val, unsigned size) {
     switch (mode) {
+    case TexturingRegs::TextureConfig::ClampToEdge2:
+        // For negative coordinate, ClampToEdge2 behaves the same as Repeat
+        if (val < 0) {
+            return static_cast<int>(static_cast<unsigned>(val) % size);
+        }
+    // [[fallthrough]]
     case TexturingRegs::TextureConfig::ClampToEdge:
         val = std::max(val, 0);
-        val = std::min(val, (int)size - 1);
+        val = std::min(val, static_cast<int>(size) - 1);
         return val;
 
     case TexturingRegs::TextureConfig::ClampToBorder:
         return val;
 
+    case TexturingRegs::TextureConfig::ClampToBorder2:
+    // For ClampToBorder2, the case of positive coordinate beyond the texture size is already
+    // handled outside. Here we only handle the negative coordinate in the same way as Repeat.
+    case TexturingRegs::TextureConfig::Repeat2:
+    case TexturingRegs::TextureConfig::Repeat3:
     case TexturingRegs::TextureConfig::Repeat:
-        return (int)((unsigned)val % size);
+        return static_cast<int>(static_cast<unsigned>(val) % size);
 
     case TexturingRegs::TextureConfig::MirroredRepeat: {
-        unsigned int coord = ((unsigned)val % (2 * size));
+        unsigned int coord = (static_cast<unsigned>(val) % (2 * size));
         if (coord >= size)
             coord = 2 * size - 1 - coord;
-        return (int)coord;
+        return static_cast<int>(coord);
     }
 
     default: