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feat(gx): handle projection and view matrices in GLL backend

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This commit is contained in:
fallenoak 2023-04-14 08:02:40 -05:00
parent eb70607750
commit 317d94cd1a
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GPG Key ID: 7628F8E61AEA070D
4 changed files with 214 additions and 9 deletions
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164
src/gx/gll/GLDevice.cpp
View File

@ -628,8 +628,59 @@ void GLDevice::ApplyGLStates(const GLStates& states, bool force) {
{
glMatrixMode(GL_PROJECTION);
// TODO
// - some interesting logic to manipulate the projection matrix before loading
GLTransform projection = {
true,
{
1.0f, 0.0f, 0.0f, 0.0f,
0.0f, 1.0f, 0.0f, 0.0f,
0.0f, 0.0f, 1.0f, 0.0f,
0.0f, 0.0f, 0.0f, 1.0f,
},
true
};
if (!states.fixedFunc.transforms.projection.isIdentity) {
projection.isIdentity = false;
memcpy(projection.m, states.fixedFunc.transforms.projection.m, sizeof(projection.m));
projection.isDirty = true;
}
if (projection.isIdentity) {
projection.SetIdentity();
}
projection.a1 *= -1.0f;
projection.b1 *= -1.0f;
projection.c1 *= -1.0f;
projection.d1 *= -1.0f;
auto isIdentity = projection.a0 == 1.0f
&& projection.a1 == 0.0f
&& projection.a2 == 0.0f
&& projection.a3 == 0.0f
&& projection.b0 == 0.0f
&& projection.b1 == 1.0f
&& projection.b2 == 0.0f
&& projection.b3 == 0.0f
&& projection.c0 == 0.0f
&& projection.c1 == 0.0f
&& projection.c2 == 1.0f
&& projection.c3 == 0.0f
&& projection.d0 == 0.0f
&& projection.d1 == 0.0f
&& projection.d2 == 0.0f
&& projection.d3 == 1.0f;
projection.isDirty = true;
if (isIdentity) {
glLoadIdentity();
} else {
glLoadMatrixf(projection.m);
}
projection.isDirty = false;
}
glMatrixMode(states.fixedFunc.transforms.matrixMode);
@ -892,7 +943,53 @@ void GLDevice::ApplyShaderConstants() {
}
void GLDevice::ApplyTransforms() {
// TODO
this->SetModelView(GL_MODELVIEW);
auto& projection = this->m_States.fixedFunc.transforms.projection;
if (projection.isDirty) {
if (projection.isIdentity) {
projection.SetIdentity();
}
projection.a1 *= -1.0f;
projection.b1 *= -1.0f;
projection.c1 *= -1.0f;
projection.d1 *= -1.0f;
projection.isIdentity = projection.a0 == 1.0f
&& projection.a1 == 0.0f
&& projection.a2 == 0.0f
&& projection.a3 == 0.0f
&& projection.b0 == 0.0f
&& projection.b1 == 1.0f
&& projection.b2 == 0.0f
&& projection.b3 == 0.0f
&& projection.c0 == 0.0f
&& projection.c1 == 0.0f
&& projection.c2 == 1.0f
&& projection.c3 == 0.0f
&& projection.d0 == 0.0f
&& projection.d1 == 0.0f
&& projection.d2 == 0.0f
&& projection.d3 == 1.0f;
projection.isDirty = true;
if (this->m_States.fixedFunc.transforms.matrixMode != GL_PROJECTION) {
glMatrixMode(GL_PROJECTION);
this->m_States.fixedFunc.transforms.matrixMode = GL_PROJECTION;
}
if (projection.isIdentity) {
glLoadIdentity();
} else {
glLoadMatrixf(projection.m);
}
projection.isDirty = false;
}
// TODO texture transforms
}
void GLDevice::BindBuffer(GLBuffer* buffer, GLEnum target) {
@ -2315,6 +2412,57 @@ void GLDevice::SetLightingEnable(bool enable) {
}
}
void GLDevice::SetModelView(GLEnum transform) {
if (transform == 'VIEW') {
// TODO
return;
}
if (transform == 'WRLD') {
// TODO
return;
}
if (transform != GL_MODELVIEW) {
BLIZZARD_ASSERT(false);
}
auto& world = this->m_States.fixedFunc.transforms.world;
auto& view = this->m_States.fixedFunc.transforms.view;
auto& modelView = this->m_States.fixedFunc.transforms.modelView;
if (this->m_States.fixedFunc.transforms.modelviewStatus != transform || modelView.isDirty) {
if (world.isIdentity && view.isIdentity) {
modelView.isIdentity = true;
modelView.isDirty = true;
} else if (world.isIdentity) {
modelView = view;
modelView.isIdentity = false;
modelView.isDirty = true;
} else if (view.isIdentity) {
modelView = world;
modelView.isIdentity = false;
modelView.isDirty = true;
} else {
// TODO assign model * view to modelView
BLIZZARD_ASSERT(!"Unimplemented");
}
if (this->m_States.fixedFunc.transforms.matrixMode != GL_MODELVIEW) {
glMatrixMode(GL_MODELVIEW);
this->m_States.fixedFunc.transforms.matrixMode = GL_MODELVIEW;
}
if (modelView.isIdentity) {
glLoadIdentity();
} else {
glLoadMatrixf(modelView.m);
}
this->m_States.fixedFunc.transforms.modelviewStatus = transform;
}
}
void GLDevice::SetScissor(bool a2, const GLRect& a3) {
// TODO
}
@ -2469,15 +2617,13 @@ void GLDevice::SetTransform(GLEnum transform, const float* a3) {
BLIZZARD_ASSERT(false);
}
// TODO
// int32_t needsUpdate = !(t == a3); // GLTransform::operator==()
// if (needsUpdate) {
// t.Set(a3);
// }
if (*t != a3) {
t->Set(a3);
}
if (t->isDirty) {
if (transform == 'VIEW' || transform == 'WRLD') {
this->m_States.fixedFunc.transforms.modelView.isDirty = 1;
this->m_States.fixedFunc.transforms.modelView.isDirty = true;
}
}
}

1
src/gx/gll/GLDevice.h
View File

@ -172,6 +172,7 @@ class GLDevice {
void SetFogParam(GLEnum param, float value);
void SetIndexBuffer(GLBuffer*);
void SetLightingEnable(bool enable);
void SetModelView(GLEnum view);
void SetScissor(bool, const GLRect&);
void SetShader(GLShader::ShaderType, GLShader*);
void SetShaderConstants(GLShader::ShaderType, uint32_t, const float*, uint32_t);

53
src/gx/gll/GLTypes.cpp
View File

@ -1,5 +1,58 @@
#include "gx/gll/GLTypes.h"
#include <cstring>
GLColor4f GLColor4f::ZERO = { 0.0, 0.0, 0.0, 0.0 };
GLColor4f GLColor4f::WHITE = { 1.0, 1.0, 1.0, 1.0 };
GLColor4f GLColor4f::BLACK = { 0.0, 0.0, 0.0, 1.0 };
bool GLTransform::operator==(const float m[16]) const {
return this->m[0] == m[0]
&& this->m[1] == m[1]
&& this->m[2] == m[2]
&& this->m[3] == m[3]
&& this->m[4] == m[4]
&& this->m[5] == m[5]
&& this->m[6] == m[6]
&& this->m[7] == m[7]
&& this->m[8] == m[8]
&& this->m[9] == m[9]
&& this->m[10] == m[10]
&& this->m[11] == m[11]
&& this->m[12] == m[12]
&& this->m[13] == m[13]
&& this->m[14] == m[14]
&& this->m[15] == m[15];
}
bool GLTransform::operator!=(const float m[16]) const {
return !(*this == m);
}
void GLTransform::Set(const float m[16]) {
memcpy(this->m, m, sizeof(this->m));
this->isDirty = true;
this->isIdentity = this->a0 == 1.0f
&& this->a1 == 0.0f
&& this->a2 == 0.0f
&& this->a3 == 0.0f
&& this->b0 == 0.0f
&& this->b1 == 1.0f
&& this->b2 == 0.0f
&& this->b3 == 0.0f
&& this->c0 == 0.0f
&& this->c1 == 0.0f
&& this->c2 == 1.0f
&& this->c3 == 0.0f
&& this->d0 == 0.0f
&& this->d1 == 0.0f
&& this->d2 == 0.0f
&& this->d3 == 1.0f;
}
void GLTransform::SetIdentity() {
memset(this->m, 0, sizeof(this->m));
this->a0 = 1.0f;
this->b1 = 1.0f;
this->c2 = 1.0f;
this->d3 = 1.0f;
}

5
src/gx/gll/GLTypes.h
View File

@ -138,6 +138,11 @@ struct GLTransform {
};
bool isIdentity;
bool operator==(const float m[16]) const;
bool operator!=(const float m[16]) const;
void Set(const float m[16]);
void SetIdentity();
};
struct GLStates {