1. rcrnstn/gltexture
  2. include
  3. gltexture2d.hpp
Browse code

Add implementation

Robert Cranston authored on 29/12/2021 16:30:02
Showing 1 changed files
include/gltexture2d.hpp
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+#ifndef GLTEXTURE2D_HPP_
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+#define GLTEXTURE2D_HPP_
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+
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+
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+#include <string>
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+#include <utility>
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+
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+#include <globject.hpp>
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+#include <gltexturend.hpp>
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+
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+
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+/// Class
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+
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+class GLTexture2D : public GLTextureND<2>
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+{
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+public:
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+
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+    /// Special member functions
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+
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+    explicit GLTexture2D(
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+        std::string object_label,
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+        Size        size,
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+        GLenum      internal_format = GL_RGBA8,
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+        GLenum      wrap            = GL_REPEAT,
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+        GLenum      min_filter      = GL_LINEAR_MIPMAP_LINEAR,
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+        GLenum      mag_filter      = GL_LINEAR
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+    );
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+
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+    /// Core
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+
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+    GLTexture2D static const & empty();
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+
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+    /// TGA
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+
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+    GLTexture2D static tga_read(
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+        Path const & path,
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+        GLenum       format          = GL_BGRA,
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+        GLenum       internal_format = GL_SRGB8_ALPHA8,
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+        GLenum       wrap            = GL_REPEAT,
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+        GLenum       min_filter      = GL_LINEAR_MIPMAP_LINEAR,
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+        GLenum       mag_filter      = GL_LINEAR
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+    );
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+
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+    void tga_write(
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+        Path const & path,
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+        GLenum       format = GL_BGRA
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+    ) const;
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+
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+private:
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+
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+    /// Core
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+
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+    void virtual data_(
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+        void const * data,
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+        GLenum       target,
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+        GLenum       format,
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+        GLenum       type
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+    ) override;
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+};
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+
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+
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+/// Special member functions
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+
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+inline GLTexture2D::GLTexture2D(
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+    std::string object_label,
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+    Size        size,
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+    GLenum      internal_format,
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+    GLenum      wrap,
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+    GLenum      min_filter,
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+    GLenum      mag_filter
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+)
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+:
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+    GLTextureND(
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+        std::move(object_label),
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+        GL_TEXTURE_2D,
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+        GL_TEXTURE_BINDING_2D,
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+        GL_MAX_TEXTURE_SIZE,
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+        size,
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+        internal_format,
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+        wrap,
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+        min_filter,
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+        mag_filter
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+    )
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+{
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+    try
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+    {
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+        glTexImage2D(
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+            target_, 0,
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+            (GLint)internal_format,
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+            size[0], size[1], 0,
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+            GL_RED, GL_UNSIGNED_BYTE, nullptr
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+        );
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+        check_error_(glGetError());
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+    }
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+    catch (...)
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+    {
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+        fail_action_("create");
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+    }
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+}
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+
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+/// Core
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+
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+inline GLTexture2D const & GLTexture2D::empty()
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+{
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+    return empty_<GLTexture2D>();
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+}
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+
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+inline void GLTexture2D::data_(
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+    void const * data,
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+    GLenum       target,
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+    GLenum       format,
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+    GLenum       type
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+)
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+{
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+    glTexSubImage2D(
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+        target, 0,
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+        0, 0,
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+        size()[0], size()[1],
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+        format, type, data
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+    );
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+}
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+
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+
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+#endif // GLTEXTURE2D_HPP_