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Merge branch 'Add_gluBuild2DMipmaps' into 'master'

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Add gluBuild2DMipmaps()

See merge request simulant/GLdc!93
This commit is contained in:
Luke Benstead 2022-02-01 08:28:40 +00:00
commit 4ad5f00538
3 changed files with 20 additions and 5 deletions
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12
GL/framebuffer.c
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@ -320,6 +320,18 @@ void APIENTRY glGenerateMipmapEXT(GLenum target) {
assert(_glIsMipmapComplete(tex));
}
/* generate mipmaps for any image provided by the user and then pass them to OpenGL */
GLAPI GLint APIENTRY gluBuild2DMipmaps(GLenum target, GLint internalFormat,
GLsizei width, GLsizei height,
GLenum format, GLenum type, const void *data){
/* 2d texture, level of detail 0 (normal), 3 components (red, green, blue),
width & height of the image, border 0 (normal), rgb color data,
unsigned byte data, and finally the data itself. */
glTexImage2D(GL_TEXTURE_2D, 0, 3, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, data);
glGenerateMipmapEXT(GL_TEXTURE_2D);
}
GLenum APIENTRY glCheckFramebufferStatusEXT(GLenum target) {
if(target != GL_FRAMEBUFFER_EXT) {
_glKosThrowError(GL_INVALID_ENUM, __func__);

5
include/GL/glu.h
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@ -34,6 +34,11 @@ GLAPI void APIENTRY gluLookAt(GLfloat eyex, GLfloat eyey, GLfloat eyez,
GLfloat centerx, GLfloat centery, GLfloat centerz,
GLfloat upx, GLfloat upy, GLfloat upz);
/* generate mipmaps for any image provided by the user and then pass them to OpenGL */
GLAPI GLint APIENTRY gluBuild2DMipmaps(GLenum target, GLint internalFormat,
GLsizei width, GLsizei height,
GLenum format, GLenum type, const void *data);
GLAPI const GLubyte* APIENTRY gluErrorString(GLenum error);
__END_DECLS

8
samples/mipmap/main.c
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@ -47,11 +47,9 @@ void LoadGLTextures() {
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR); // scale linearly when image bigger than texture
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR_MIPMAP_LINEAR); // scale linearly when image smalled than texture
// 2d texture, level of detail 0 (normal), 3 components (red, green, blue), x size from image, y size from image,
// border 0 (normal), rgb color data, unsigned byte data, and finally the data itself.
glTexImage2D(GL_TEXTURE_2D, 0, 3, image1->sizeX, image1->sizeY, 0, GL_RGB, GL_UNSIGNED_BYTE, image1->data);
glGenerateMipmapEXT(GL_TEXTURE_2D);
// 2d texture, 3 components (red, green, blue), x size from image, y size from image,
// rgb color data, unsigned byte data, and finally the data itself.
gluBuild2DMipmaps(GL_TEXTURE_2D, 3, image1->sizeX, image1->sizeY, GL_RGB, GL_UNSIGNED_BYTE, image1->data);
free(image1);
};