feat: texture and pixel buffers

1 files changed, 65 insertions, 0 deletions

diff --git a/src/platform/opengl/opengl_texture.cpp b/src/platform/opengl/opengl_texture.cpp
new file mode 100644
index 0000000..87e9345
--- /dev/null
+++ b/src/platform/opengl/opengl_texture.cpp
@@ -0,0 +1,65 @@
+#include "opengl_texture.h"
+#include <iostream>
+
+namespace Donut
+{
+    OpenGLTexture2D::OpenGLTexture2D(uint32_t width, uint32_t height)
+        : m_width(width), m_height(height)
+    {
+        m_internal_format = GL_RGBA8;
+        m_data_format = GL_RGBA;
+
+        glCreateTextures(GL_TEXTURE_2D, 1, &m_renderer_id);
+        glTextureStorage2D(m_renderer_id, 1, m_internal_format, m_width, m_height);
+
+        glTextureParameteri(m_renderer_id, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+        glTextureParameteri(m_renderer_id, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+        glTextureParameteri(m_renderer_id, GL_TEXTURE_WRAP_S, GL_REPEAT);
+        glTextureParameteri(m_renderer_id, GL_TEXTURE_WRAP_T, GL_REPEAT);
+    }
+
+    OpenGLTexture2D::OpenGLTexture2D(const std::string& path)
+        : m_path(path)
+    {
+        m_width = 1;
+        m_height = 1;
+        m_internal_format = GL_RGBA8;
+        m_data_format = GL_RGBA;
+
+        glCreateTextures(GL_TEXTURE_2D, 1, &m_renderer_id);
+        glTextureStorage2D(m_renderer_id, 1, m_internal_format, m_width, m_height);
+
+        glTextureParameteri(m_renderer_id, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+        glTextureParameteri(m_renderer_id, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+        glTextureParameteri(m_renderer_id, GL_TEXTURE_WRAP_S, GL_REPEAT);
+        glTextureParameteri(m_renderer_id, GL_TEXTURE_WRAP_T, GL_REPEAT);
+
+        uint32_t white_pixel = 0xFFFFFFFF;
+        glTextureSubImage2D(m_renderer_id, 0, 0, 0, m_width, m_height, m_data_format, GL_UNSIGNED_BYTE, &white_pixel);
+
+        std::cout << "Created default texture (stb_image not available for loading: " << path << ")" << std::endl;
+    }
+
+    OpenGLTexture2D::~OpenGLTexture2D()
+    {
+        glDeleteTextures(1, &m_renderer_id);
+    }
+
+    void OpenGLTexture2D::set_data(void* data, uint32_t size)
+    {
+        uint32_t bpp = m_data_format == GL_RGBA ? 4 : 3;
+        if (size != m_width * m_height * bpp)
+        {
+            std::cout << "Data must be entire texture!" << std::endl;
+            return;
+        }
+        glTextureSubImage2D(m_renderer_id, 0, 0, 0, m_width, m_height, m_data_format, GL_UNSIGNED_BYTE, data);
+    }
+
+    void OpenGLTexture2D::bind(uint32_t slot) const
+    {
+        glBindTextureUnit(slot, m_renderer_id);
+    }
+};