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shader prog

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This commit is contained in:
Dominic Masters
2026-03-17 17:05:39 -05:00
parent ff92a78dda
commit 66ebcb1608
11 changed files with 303 additions and 140 deletions
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4
src/duskgl/display/displaygl.c
View File

@@ -8,6 +8,8 @@
#include "displaygl.h"
errorret_t displayOpenGLInit(void) {
glDisable(GL_CULL_FACE);
// glDisable(GL_LIGHTING);// PSP defaults this on?
// glShadeModel(GL_SMOOTH); // Fixes color on PSP?
@@ -29,7 +31,5 @@ errorret_t displayOpenGLInit(void) {
// glEnableClientState(GL_VERTEX_ARRAY);
// errorChain(errorGLCheck());
errorChain(shaderInit(&testShader, &SHADER_UNLIT_DEFINITION));
errorOk();
}

3
src/duskgl/display/displaygl.h
View File

@@ -7,9 +7,6 @@
#pragma once
#include "error/errorgl.h"
#include "display/shader/shaderunlit.h"
static shadergl_t testShader;
/**
* Initializes the OpenGL specific contexts for rendering.

132
src/duskgl/display/mesh/meshgl.c
View File

@@ -21,7 +21,74 @@ errorret_t meshInitGL(
mesh->primitiveType = primitiveType;
mesh->vertexCount = vertexCount;
mesh->vertices = vertices;
#ifdef DUSK_OPENGL_LEGACY
mesh->vertices = vertices;
#else
// Generate Vertex Buffer Object
glGenBuffers(1, &mesh->vboId);
errorChain(errorGLCheck());
glBindBuffer(GL_ARRAY_BUFFER, mesh->vboId);
errorChain(errorGLCheck());
glBufferData(
GL_ARRAY_BUFFER,
vertexCount * sizeof(meshvertex_t),
vertices,
GL_STATIC_DRAW
);
errorChain(errorGLCheck());
// Generate Vertex Array Object
glGenVertexArrays(1, &mesh->vaoId);
errorChain(errorGLCheck());
glBindVertexArray(mesh->vaoId);
errorChain(errorGLCheck());
glBindBuffer(GL_ARRAY_BUFFER, mesh->vboId);
errorChain(errorGLCheck());
// Set up vertex attribute pointers
glVertexAttribPointer(
0,
MESH_VERTEX_POS_SIZE,
GL_FLOAT,
GL_FALSE,
sizeof(meshvertex_t),
(const GLvoid*)offsetof(meshvertex_t, pos)
);
errorChain(errorGLCheck());
glEnableVertexAttribArray(0);
errorChain(errorGLCheck());
glVertexAttribPointer(
1,
MESH_VERTEX_UV_SIZE,
GL_FLOAT,
GL_FALSE,
sizeof(meshvertex_t),
(const GLvoid*)offsetof(meshvertex_t, uv)
);
errorChain(errorGLCheck());
glEnableVertexAttribArray(1);
errorChain(errorGLCheck());
glVertexAttribPointer(
2,
sizeof(color_t) / sizeof(GLubyte),
GL_UNSIGNED_BYTE,
GL_TRUE,
sizeof(meshvertex_t),
(const GLvoid*)offsetof(meshvertex_t, color)
);
errorChain(errorGLCheck());
glEnableVertexAttribArray(2);
errorChain(errorGLCheck());
// Unbind VAO and VBO to prevent accidental modification
glBindBuffer(GL_ARRAY_BUFFER, 0);
errorChain(errorGLCheck());
glBindVertexArray(0);
errorChain(errorGLCheck());
#endif
errorOk();
}
@@ -31,30 +98,40 @@ errorret_t meshDrawGL(
const int32_t offset,
const int32_t count
) {
// PSP style pointer legacy OpenGL
const GLsizei stride = sizeof(meshvertex_t);
#ifdef DUSK_OPENGL_LEGACY
// Legacy pointer style rendering
const GLsizei stride = sizeof(meshvertex_t);
// glColorPointer(
// sizeof(color4b_t),
// GL_UNSIGNED_BYTE,
// stride,
// (const GLvoid*)&mesh->vertices[offset].color
// );
// glTexCoordPointer(
// MESH_VERTEX_UV_SIZE,
// GL_FLOAT,
// stride,
// (const GLvoid*)&mesh->vertices[offset].uv
// );
// glVertexPointer(
// MESH_VERTEX_POS_SIZE,
// GL_FLOAT,
// stride,
// (const GLvoid*)&mesh->vertices[offset].pos
// );
glColorPointer(
sizeof(color4b_t),
GL_UNSIGNED_BYTE,
stride,
(const GLvoid*)&mesh->vertices[offset].color
);
glTexCoordPointer(
MESH_VERTEX_UV_SIZE,
GL_FLOAT,
stride,
(const GLvoid*)&mesh->vertices[offset].uv
);
glVertexPointer(
MESH_VERTEX_POS_SIZE,
GL_FLOAT,
stride,
(const GLvoid*)&mesh->vertices[offset].pos
);
// glDrawArrays(mesh->primitiveType, offset, count);
// errorChain(errorGLCheck());
glDrawArrays(mesh->primitiveType, offset, count);
errorChain(errorGLCheck());
#else
// Modern VAO/VBO rendering
glBindVertexArray(mesh->vaoId);
errorChain(errorGLCheck());
glDrawArrays(mesh->primitiveType, offset, count);
errorChain(errorGLCheck());
glBindVertexArray(0);
errorChain(errorGLCheck());
#endif
errorOk();
}
@@ -64,6 +141,13 @@ int32_t meshGetVertexCountGL(const meshgl_t *mesh) {
}
errorret_t meshDisposeGL(meshgl_t *mesh) {
// No dynamic resources to free for this mesh implementation
#ifdef DUSK_OPENGL_LEGACY
// No dynamic resources to free for this mesh implementation
#else
glDeleteBuffers(1, &mesh->vboId);
errorChain(errorGLCheck());
glDeleteVertexArrays(1, &mesh->vaoId);
errorChain(errorGLCheck());
#endif
errorOk();
}

8
src/duskgl/display/mesh/meshgl.h
View File

@@ -16,9 +16,15 @@ typedef enum {
} meshprimitivetypegl_t;
typedef struct {
const meshvertex_t *vertices;
int32_t vertexCount;
meshprimitivetypegl_t primitiveType;
#ifdef DUSK_OPENGL_LEGACY
const meshvertex_t *vertices;
#else
GLuint vaoId;
GLuint vboId;
#endif
} meshgl_t;
/**

196
src/duskgl/display/shader/shadergl.c
View File

@@ -12,116 +12,120 @@
errorret_t shaderInitGL(shadergl_t *shader, const shaderdefinitiongl_t *def) {
assertNotNull(shader, "Shader cannot be null");
assertNotNull(def, "Shader definition cannot be null");
memoryZero(shader, sizeof(shadergl_t));
// Create vertex shader
shader->vertexShaderId = glCreateShader(GL_VERTEX_SHADER);
errorret_t err = errorGLCheck();
errorChain(err);
glShaderSource(shader->vertexShaderId, 1, &def->vert, NULL);
err = errorGLCheck();
if(err.code != ERROR_OK) {
glDeleteShader(shader->vertexShaderId);
#ifdef DUSK_OPENGL_LEGACY
// No initialization needed for legacy shader
errorOk();
#else
// Create vertex shader
shader->vertexShaderId = glCreateShader(GL_VERTEX_SHADER);
errorret_t err = errorGLCheck();
errorChain(err);
}
glCompileShader(shader->vertexShaderId);
err = errorGLCheck();
if(err.code != ERROR_OK) {
glDeleteShader(shader->vertexShaderId);
errorChain(err);
}
glShaderSource(shader->vertexShaderId, 1, &def->vert, NULL);
err = errorGLCheck();
if(err.code != ERROR_OK) {
glDeleteShader(shader->vertexShaderId);
errorChain(err);
}
GLint ok = 0;
glGetShaderiv(shader->vertexShaderId, GL_COMPILE_STATUS, &ok);
if(!ok) {
GLchar log[1024];
glGetShaderInfoLog(shader->vertexShaderId, sizeof(log), NULL, log);
glDeleteShader(shader->vertexShaderId);
errorThrow("Vertex shader compilation failed: %s", log);
}
glCompileShader(shader->vertexShaderId);
err = errorGLCheck();
if(err.code != ERROR_OK) {
glDeleteShader(shader->vertexShaderId);
errorChain(err);
}
// Create fragment shader
shader->fragmentShaderId = glCreateShader(GL_FRAGMENT_SHADER);
err = errorGLCheck();
if(err.code != ERROR_OK) {
glDeleteShader(shader->vertexShaderId);
errorChain(err);
}
GLint ok = 0;
glGetShaderiv(shader->vertexShaderId, GL_COMPILE_STATUS, &ok);
if(!ok) {
GLchar log[1024];
glGetShaderInfoLog(shader->vertexShaderId, sizeof(log), NULL, log);
glDeleteShader(shader->vertexShaderId);
errorThrow("Vertex shader compilation failed: %s", log);
}
glShaderSource(shader->fragmentShaderId, 1, &def->frag, NULL);
err = errorGLCheck();
if(err.code != ERROR_OK) {
glDeleteShader(shader->vertexShaderId);
glDeleteShader(shader->fragmentShaderId);
errorChain(err);
}
// Create fragment shader
shader->fragmentShaderId = glCreateShader(GL_FRAGMENT_SHADER);
err = errorGLCheck();
if(err.code != ERROR_OK) {
glDeleteShader(shader->vertexShaderId);
errorChain(err);
}
glCompileShader(shader->fragmentShaderId);
err = errorGLCheck();
if(err.code != ERROR_OK) {
glDeleteShader(shader->vertexShaderId);
glDeleteShader(shader->fragmentShaderId);
errorChain(err);
}
glShaderSource(shader->fragmentShaderId, 1, &def->frag, NULL);
err = errorGLCheck();
if(err.code != ERROR_OK) {
glDeleteShader(shader->vertexShaderId);
glDeleteShader(shader->fragmentShaderId);
errorChain(err);
}
glGetShaderiv(shader->fragmentShaderId, GL_COMPILE_STATUS, &ok);
if(!ok) {
GLchar log[1024];
glGetShaderInfoLog(shader->fragmentShaderId, sizeof(log), NULL, log);
glDeleteShader(shader->vertexShaderId);
glDeleteShader(shader->fragmentShaderId);
errorThrow("Fragment shader compilation failed: %s", log);
}
glCompileShader(shader->fragmentShaderId);
err = errorGLCheck();
if(err.code != ERROR_OK) {
glDeleteShader(shader->vertexShaderId);
glDeleteShader(shader->fragmentShaderId);
errorChain(err);
}
// Create shader program
shader->shaderProgramId = glCreateProgram();
err = errorGLCheck();
if(err.code != ERROR_OK) {
glDeleteShader(shader->vertexShaderId);
glDeleteShader(shader->fragmentShaderId);
errorChain(err);
}
glGetShaderiv(shader->fragmentShaderId, GL_COMPILE_STATUS, &ok);
if(!ok) {
GLchar log[1024];
glGetShaderInfoLog(shader->fragmentShaderId, sizeof(log), NULL, log);
glDeleteShader(shader->vertexShaderId);
glDeleteShader(shader->fragmentShaderId);
errorThrow("Fragment shader compilation failed: %s", log);
}
glAttachShader(shader->shaderProgramId, shader->vertexShaderId);
err = errorGLCheck();
if(err.code != ERROR_OK) {
glDeleteProgram(shader->shaderProgramId);
glDeleteShader(shader->vertexShaderId);
glDeleteShader(shader->fragmentShaderId);
errorChain(err);
}
// Create shader program
shader->shaderProgramId = glCreateProgram();
err = errorGLCheck();
if(err.code != ERROR_OK) {
glDeleteShader(shader->vertexShaderId);
glDeleteShader(shader->fragmentShaderId);
errorChain(err);
}
glAttachShader(shader->shaderProgramId, shader->fragmentShaderId);
err = errorGLCheck();
if(err.code != ERROR_OK) {
glDeleteProgram(shader->shaderProgramId);
glDeleteShader(shader->vertexShaderId);
glDeleteShader(shader->fragmentShaderId);
errorChain(err);
}
glAttachShader(shader->shaderProgramId, shader->vertexShaderId);
err = errorGLCheck();
if(err.code != ERROR_OK) {
glDeleteProgram(shader->shaderProgramId);
glDeleteShader(shader->vertexShaderId);
glDeleteShader(shader->fragmentShaderId);
errorChain(err);
}
glLinkProgram(shader->shaderProgramId);
err = errorGLCheck();
if(err.code != ERROR_OK) {
glDeleteProgram(shader->shaderProgramId);
glDeleteShader(shader->vertexShaderId);
glDeleteShader(shader->fragmentShaderId);
errorChain(err);
}
glAttachShader(shader->shaderProgramId, shader->fragmentShaderId);
err = errorGLCheck();
if(err.code != ERROR_OK) {
glDeleteProgram(shader->shaderProgramId);
glDeleteShader(shader->vertexShaderId);
glDeleteShader(shader->fragmentShaderId);
errorChain(err);
}
ok = 0;
glGetProgramiv(shader->shaderProgramId, GL_LINK_STATUS, &ok);
if(!ok) {
GLchar log[1024];
glGetProgramInfoLog(shader->shaderProgramId, sizeof(log), NULL, log);
glDeleteProgram(shader->shaderProgramId);
glDeleteShader(shader->vertexShaderId);
glDeleteShader(shader->fragmentShaderId);
errorThrow("Shader program linking failed: %s", log);
}
glLinkProgram(shader->shaderProgramId);
err = errorGLCheck();
if(err.code != ERROR_OK) {
glDeleteProgram(shader->shaderProgramId);
glDeleteShader(shader->vertexShaderId);
glDeleteShader(shader->fragmentShaderId);
errorChain(err);
}
ok = 0;
glGetProgramiv(shader->shaderProgramId, GL_LINK_STATUS, &ok);
if(!ok) {
GLchar log[1024];
glGetProgramInfoLog(shader->shaderProgramId, sizeof(log), NULL, log);
glDeleteProgram(shader->shaderProgramId);
glDeleteShader(shader->vertexShaderId);
glDeleteShader(shader->fragmentShaderId);
errorThrow("Shader program linking failed: %s", log);
}
#endif
errorOk();
}

18
src/duskgl/display/shader/shadergl.h
View File

@@ -9,14 +9,22 @@
#include "error/errorgl.h"
typedef struct {
GLuint shaderProgramId;
GLuint vertexShaderId;
GLuint fragmentShaderId;
#ifdef DUSK_OPENGL_LEGACY
void *nothing;
#else
GLuint shaderProgramId;
GLuint vertexShaderId;
GLuint fragmentShaderId;
#endif
} shadergl_t;
typedef struct {
const char_t *vert;
const char_t *frag;
#ifdef DUSK_OPENGL_LEGACY
void *nothing;
#else
const char_t *vert;
const char_t *frag;
#endif
} shaderdefinitiongl_t;
/**

7
src/duskgl/display/shader/shaderunlitgl.c
View File

@@ -11,22 +11,17 @@ shaderdefinition_t SHADER_UNLIT_DEFINITION = {
.vert =
"#version 330 core\n"
"layout(location = 0) in vec3 aPos;\n"
"layout(location = 1) in vec2 aTexCoord;\n"
"uniform mat4 u_Proj;\n"
"uniform mat4 u_View;\n"
"uniform mat4 u_Model;\n"
"out vec2 v_TexCoord;\n"
"void main() {\n"
" gl_Position = u_Proj * u_View * u_Model * vec4(aPos, 1.0);\n"
" v_TexCoord = aTexCoord;\n"
"}\n",
.frag =
"#version 330 core\n"
"in vec2 v_TexCoord;\n"
"out vec4 FragColor;\n"
"uniform sampler2D u_Texture;\n"
"void main() {\n"
" FragColor = texture(u_Texture, v_TexCoord);\n"
" FragColor = vec4(1.0, 0.0, 0.0, 1.0);\n"
"}\n"
};