LibGL: Implement glVertexPointer

Userland/Libraries/LibGL/CMakeLists.txt

@@ -13,6 +13,7 @@ set(SOURCES
     GLTexture.cpp
     GLUtils.cpp
     GLVert.cpp
+    GLVertexArrays.cpp
     SoftwareGLContext.cpp
     SoftwareRasterizer.cpp
     DepthBuffer.cpp

Userland/Libraries/LibGL/GL/gl.h

@@ -141,6 +141,7 @@ extern "C" {
 #define GL_INT 0x1404
 #define GL_UNSIGNED_INT 0x1405
 #define GL_FLOAT 0x1406
+#define GL_DOUBLE 0x140A
 
 // Format enums
 #define GL_COLOR_INDEX 0x1900
@@ -356,6 +357,7 @@ GLAPI void glGetFloatv(GLenum pname, GLfloat* params);
 GLAPI void glDepthMask(GLboolean flag);
 GLAPI void glEnableClientState(GLenum cap);
 GLAPI void glDisableClientState(GLenum cap);
+GLAPI void glVertexPointer(GLint size, GLenum type, GLsizei stride, const void* pointer);
 
 #ifdef __cplusplus
 }

Userland/Libraries/LibGL/GLContext.h

@@ -66,6 +66,7 @@ public:
     virtual void gl_depth_mask(GLboolean flag) = 0;
     virtual void gl_enable_client_state(GLenum cap) = 0;
     virtual void gl_disable_client_state(GLenum cap) = 0;
+    virtual void gl_vertex_pointer(GLint size, GLenum type, GLsizei stride, const void* pointer) = 0;
 
     virtual void present() = 0;
 };

Userland/Libraries/LibGL/GLVertexArrays.cpp

@@ -0,0 +1,15 @@
+/*
+ * Copyright (c) 2021, Stephan Unverwerth <s.unverwerth@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include "GL/gl.h"
+#include "GLContext.h"
+
+extern GL::GLContext* g_gl_context;
+
+void glVertexPointer(GLint size, GLenum type, GLsizei stride, const void* pointer)
+{
+    g_gl_context->gl_vertex_pointer(size, type, stride, pointer);
+}

Userland/Libraries/LibGL/SoftwareGLContext.cpp

@@ -1447,6 +1447,20 @@ void SoftwareGLContext::gl_disable_client_state(GLenum cap)
     }
 }
 
+void SoftwareGLContext::gl_vertex_pointer(GLint size, GLenum type, GLsizei stride, const void* pointer)
+{
+    RETURN_WITH_ERROR_IF(m_in_draw_state, GL_INVALID_OPERATION);
+
+    RETURN_WITH_ERROR_IF(!(size == 1 || size == 2 || size == 4), GL_INVALID_VALUE);
+    RETURN_WITH_ERROR_IF(!(type == GL_SHORT || type == GL_INT || type == GL_FLOAT || type == GL_DOUBLE), GL_INVALID_ENUM);
+    RETURN_WITH_ERROR_IF(stride < 0, GL_INVALID_VALUE);
+
+    m_client_vertex_pointer.size = size;
+    m_client_vertex_pointer.type = type;
+    m_client_vertex_pointer.stride = stride;
+    m_client_vertex_pointer.pointer = pointer;
+}
+
 void SoftwareGLContext::present()
 {
     m_rasterizer.blit_to(*m_frontbuffer);

Userland/Libraries/LibGL/SoftwareGLContext.h

@@ -76,6 +76,7 @@ public:
     virtual void gl_depth_mask(GLboolean flag) override;
     virtual void gl_enable_client_state(GLenum cap) override;
     virtual void gl_disable_client_state(GLenum cap) override;
+    virtual void gl_vertex_pointer(GLint size, GLenum type, GLsizei stride, const void* pointer) override;
 
     virtual void present() override;
 
@@ -223,6 +224,15 @@ private:
         GLenum mode { GL_COMPILE };
     };
     Optional<CurrentListing> m_current_listing_index;
+
+    struct VertexAttribPointer {
+        GLint size { 4 };
+        GLenum type { GL_FLOAT };
+        GLsizei stride { 0 };
+        const void* pointer { 0 };
+    };
+
+    VertexAttribPointer m_client_vertex_pointer;
 };
 
 }