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[Feat] (ProgramState): Implement more Global-GL-State functions.

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- These functions were implemented:
  - glBlendFunc
  - glBlendFuncSeparate
  - glClear
  - glClearColor
  - glClearDepth
  - glColorMask
  - glDepthFunc
  - glDepthMask
  - glDisable
  - glEnable
  - glViewport
This commit is contained in:
BZLZHH
2025-05-04 02:09:25 +08:00
parent 16559291a3
commit 0e7483bdd4
8 changed files with 326 additions and 17 deletions
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MG/MG_GL/State/Common/CommonState.cpp
+101
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@@ -4,6 +4,11 @@
#include "CommonState.h"
CommonState::CommonState() {
pixelStoreParams[GL_PACK_ALIGNMENT] = 4;
pixelStoreParams[GL_UNPACK_ALIGNMENT] = 4;
}
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;
@@ -54,3 +59,99 @@ GLint CommonState::QueryPixelStoreInt(GLenum pname) {
auto defaultIt = MG_Constants::PixelStore::DEFAULT_VALUES_MAP.find(pname);
return (defaultIt != MG_Constants::PixelStore::DEFAULT_VALUES_MAP.end()) ? defaultIt->second : 0;
}
GLenum CommonState::Enable(GLenum cap) {
if (MG_Constants::CommonState::VALID_CAPS.find(cap) == MG_Constants::CommonState::VALID_CAPS.end()) {
return GL_INVALID_ENUM;
}
capabilities[cap] = true;
return GL_NO_ERROR;
}
GLenum CommonState::Disable(GLenum cap) {
if (MG_Constants::CommonState::VALID_CAPS.find(cap) == MG_Constants::CommonState::VALID_CAPS.end()) {
return GL_INVALID_ENUM;
}
capabilities[cap] = false;
return GL_NO_ERROR;
}
GLenum CommonState::BlendFunc(GLenum sfactor, GLenum dfactor) {
if (MG_Constants::Blend::VALID_FACTORS.find(sfactor) == MG_Constants::Blend::VALID_FACTORS.end() ||
MG_Constants::Blend::VALID_FACTORS.find(dfactor) == MG_Constants::Blend::VALID_FACTORS.end()) {
return GL_INVALID_ENUM;
}
blendSrcRGB = blendSrcAlpha = sfactor;
blendDstRGB = blendDstAlpha = dfactor;
return GL_NO_ERROR;
}
GLenum CommonState::BlendFuncSeparate(GLenum srcRGB, GLenum dstRGB,
GLenum srcAlpha, GLenum dstAlpha) {
if (MG_Constants::Blend::VALID_FACTORS.find(srcRGB) == MG_Constants::Blend::VALID_FACTORS.end() ||
MG_Constants::Blend::VALID_FACTORS.find(dstRGB) == MG_Constants::Blend::VALID_FACTORS.end() ||
MG_Constants::Blend::VALID_FACTORS.find(srcAlpha) == MG_Constants::Blend::VALID_FACTORS.end() ||
MG_Constants::Blend::VALID_FACTORS.find(dstAlpha) == MG_Constants::Blend::VALID_FACTORS.end()) {
return GL_INVALID_ENUM;
}
blendSrcRGB = srcRGB;
blendDstRGB = dstRGB;
blendSrcAlpha = srcAlpha;
blendDstAlpha = dstAlpha;
return GL_NO_ERROR;
}
GLenum CommonState::Clear(GLbitfield mask) {
const GLbitfield validBits = GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT;
if ((mask & ~validBits) != 0) {
return GL_INVALID_VALUE;
}
return GL_NO_ERROR;
}
GLenum CommonState::ClearColor(GLfloat red, GLfloat green, GLfloat blue, GLfloat alpha) {
clearColor[0] = red;
clearColor[1] = green;
clearColor[2] = blue;
clearColor[3] = alpha;
return GL_NO_ERROR;
}
GLenum CommonState::ClearDepth(GLfloat depth) {
clearDepth = depth;
return GL_NO_ERROR;
}
GLenum CommonState::ColorMask(GLboolean red, GLboolean green, GLboolean blue, GLboolean alpha) {
colorMask[0] = red;
colorMask[1] = green;
colorMask[2] = blue;
colorMask[3] = alpha;
return GL_NO_ERROR;
}
GLenum CommonState::DepthFunc(GLenum func) {
if (MG_Constants::Depth::VALID_FUNCS.find(func) == MG_Constants::Depth::VALID_FUNCS.end()) {
return GL_INVALID_ENUM;
}
depthFunc = func;
return GL_NO_ERROR;
}
GLenum CommonState::DepthMask(GLboolean flag) {
depthMask = flag;
return GL_NO_ERROR;
}
GLenum CommonState::Viewport(GLint x, GLint y, GLsizei width, GLsizei height) {
if (width < 0 || height < 0) {
return GL_INVALID_VALUE;
}
viewport[0] = x;
viewport[1] = y;
viewport[2] = width;
viewport[3] = height;
return GL_NO_ERROR;
}