[Feat|Improvement] (...): (MG_State) Implement glPixelStorei. Optimize code.

2026-09-11 05:38:31 +09:00 · 2025-04-30 17:31:10 +08:00
parent e19df94ece
commit e644efbe81
12 changed files with 507 additions and 107 deletions
@@ -0,0 +1,56 @@
+//
+// Created by BZLZHH on 2025/4/30.
+//
+
+#include "CommonState.h"
+
+GLenum CommonState::SetPixelStoreInt(GLenum pname, GLint param) {
+    if (MG_Constants::PixelStore::VALID_PARAM_NAMES.find(pname) == MG_Constants::PixelStore::VALID_PARAM_NAMES.end()) {
+        return GL_INVALID_ENUM;
+    }
+
+    switch (pname) {
+        case GL_PACK_SWAP_BYTES:
+        case GL_PACK_LSB_FIRST:
+        case GL_UNPACK_SWAP_BYTES:
+        case GL_UNPACK_LSB_FIRST:
+            break;
+        case GL_PACK_ROW_LENGTH:
+        case GL_PACK_IMAGE_HEIGHT:
+        case GL_PACK_SKIP_ROWS:
+        case GL_PACK_SKIP_PIXELS:
+        case GL_PACK_SKIP_IMAGES:
+        case GL_UNPACK_ROW_LENGTH:
+        case GL_UNPACK_IMAGE_HEIGHT:
+        case GL_UNPACK_SKIP_ROWS:
+        case GL_UNPACK_SKIP_PIXELS:
+        case GL_UNPACK_SKIP_IMAGES:
+            if (param < 0) {
+                return GL_INVALID_VALUE;
+            }
+            break;
+
+        case GL_PACK_ALIGNMENT:
+        case GL_UNPACK_ALIGNMENT:
+            if (param != 1 && param != 2 && param != 4 && param != 8) {
+                return GL_INVALID_VALUE;
+            }
+            break;
+
+        default:
+            return GL_INVALID_ENUM;
+    }
+
+    pixelStoreParams[pname] = param;
+    return GL_NO_ERROR;
+}
+
+GLint CommonState::GetPixelStoreInt(GLenum pname) {
+    auto it = pixelStoreParams.find(pname);
+    if (it != pixelStoreParams.end()) {
+        return it->second;
+    }
+
+    auto defaultIt = MG_Constants::PixelStore::DEFAULT_VALUES_MAP.find(pname);
+    return (defaultIt != MG_Constants::PixelStore::DEFAULT_VALUES_MAP.end()) ? defaultIt->second : 0;
+}