Re: OpenGL text and Picolisp
Alexander Burger abu@... writes: BTW, Jon + Oscar: I've lost overview a little bit. But it seems that both of you added some useful functions to at lib/openGl.l Perhaps it makes sense if we add them to the PicoLisp release? If so, can one of you send me all relevant additions? ♪♫ Alex Sure thing, but am still not finished testing, still cant get textures working right. -OscarPԔ � j)mX��� ��zV�u�.n7�
Re: OpenGL text and Picolisp
Hi Alex, My work on OpenGL for 64-bit PicoLisp ended around 28-Dec-2011, when I sent you this email (not to the list): I am quite close to having my Chinese Checkers game ready for 64-bit. The functions that I have not cracked yet, are glutBitmapCharacter and glutStrokeCharacter. It is the Font parameter that is the problem. In the attached alpha version of china-gl.l I do a prinl in my drawBitString, instead of calling glutBitmapCharacter. My current openGl.l is also included in the attached china64.tgz. Do you think you can fix the font handling in those two glut functions? (I typically get freeglut stroke font 0x... not found.) You may have the china64.tgz that I mention, but if you need it, I can send it. /Jon On 14. Jul, 2015, at 18:05, Alexander Burger a...@software-lab.de wrote: Hi Oscar, On Tue, Jul 14, 2015 at 03:41:39PM +, Oscar wrote: Hi Alex, thanks for your answer its like you wrote and it does allocate normally now! Glad to hear! I have another question, before I also tried to use the glutBitmapCharacter function in which one passes a void* with the font, so I did like in the opengl.l file and added a def with the font hex as listed in freeglut_std.h but when called it says that the font wasn't found. Maybe this is a problem in what am feeding to the function, do void* have to be specified different? No, void* should also be just a number. The 'native' function doesn't care anyway to what kind of data a pointer points. The glutBitmapCharacter used I read was on china-gl.l by Jon Kleiser, but that was for the 32bit version of pico and it used glue code to specify the void pointer. In Jon's china64/openGl.l I find (de glutBitmapCharacter (Font Character) (native `*GlutLib glutBitmapCharacter NIL Font Character) ) BTW, Jon + Oscar: I've lost overview a little bit. But it seems that both of you added some useful functions to @lib/openGl.l Perhaps it makes sense if we add them to the PicoLisp release? If so, can one of you send me all relevant additions? ♪♫ Alex PԔ � j)mX��� ��zV�u�.n7�
Re: OpenGL text and Picolisp
Hi Oscar, (de glGenTextures (_tex-num _tex-ptr) (native `*GlutLib glGenTextures _tex-num (list _tex-ptr (4 . I)) ) Probably it is just a copy/paste error, but you are sure that the above expression has one more closing parenthesis, right? Because otherwise the code following this might also be part your definition. It should store a pointer in _tex-ptr but when run it gives the error *** Error in /usr/bin/picolisp: free(): invalid next size (fast) I haven't tried myself, but GL/gl.h says GLAPI void GLAPIENTRY glGenTextures( GLsizei n, GLuint *textures ); So 'textures' is an array of pointers. Is 'n' the size of that array? Then I would think the expression (list _tex-ptr (4 . I)) should be (list _tex-ptr (cons (* _tex-num 8) 'N _tex-num)) For example, if '_tex-num' is 4 and '_tex-ptr' is 'A', then this will evaluate to (A (32 N . 4)) meaning 'A' is the symbol to receive the pointer, 32 the total size of the structure, and (N . 4) an array of 4 pointers. You would call it as (glGenTextures 4 'A) Did I forget something? ♪♫ Alex -- UNSUBSCRIBE: mailto:picolisp@software-lab.de?subject=Unsubscribe
Re: OpenGL text and Picolisp
Alexander Burger abu@... writes: Hi Oscar, (de glGenTextures (_tex-num _tex-ptr) (native `*GlutLib glGenTextures _tex-num (list _tex-ptr (4 . I)) ) Probably it is just a copy/paste error, but you are sure that the above expression has one more closing parenthesis, right? Because otherwise the code following this might also be part your definition. It should store a pointer in _tex-ptr but when run it gives the error *** Error in /usr/bin/picolisp: free(): invalid next size (fast) I haven't tried myself, but GL/gl.h says GLAPI void GLAPIENTRY glGenTextures( GLsizei n, GLuint *textures ); So 'textures' is an array of pointers. Is 'n' the size of that array? Then I would think the expression (list _tex-ptr (4 . I)) should be (list _tex-ptr (cons (* _tex-num 8) 'N _tex-num)) For example, if '_tex-num' is 4 and '_tex-ptr' is 'A', then this will evaluate to (A (32 N . 4)) meaning 'A' is the symbol to receive the pointer, 32 the total size of the structure, and (N . 4) an array of 4 pointers. You would call it as (glGenTextures 4 'A) Did I forget something? ♪♫ Alex Hi Alex, thanks for your answer its like you wrote and it does allocate normally now! I have another question, before I also tried to use the glutBitmapCharacter function in which one passes a void* with the font, so I did like in the opengl.l file and added a def with the font hex as listed in freeglut_std.h but when called it says that the font wasn't found. Maybe this is a problem in what am feeding to the function, do void* have to be specified different? The glutBitmapCharacter used I read was on china-gl.l by Jon Kleiser, but that was for the 32bit version of pico and it used glue code to specify the void pointer. -Oscar.
Re: OpenGL text and Picolisp
Hi Oscar, On Tue, Jul 14, 2015 at 03:41:39PM +, Oscar wrote: Hi Alex, thanks for your answer its like you wrote and it does allocate normally now! Glad to hear! I have another question, before I also tried to use the glutBitmapCharacter function in which one passes a void* with the font, so I did like in the opengl.l file and added a def with the font hex as listed in freeglut_std.h but when called it says that the font wasn't found. Maybe this is a problem in what am feeding to the function, do void* have to be specified different? No, void* should also be just a number. The 'native' function doesn't care anyway to what kind of data a pointer points. The glutBitmapCharacter used I read was on china-gl.l by Jon Kleiser, but that was for the 32bit version of pico and it used glue code to specify the void pointer. In Jon's china64/openGl.l I find (de glutBitmapCharacter (Font Character) (native `*GlutLib glutBitmapCharacter NIL Font Character) ) BTW, Jon + Oscar: I've lost overview a little bit. But it seems that both of you added some useful functions to @lib/openGl.l Perhaps it makes sense if we add them to the PicoLisp release? If so, can one of you send me all relevant additions? ♪♫ Alex -- UNSUBSCRIBE: mailto:picolisp@software-lab.de?subject=Unsubscribe
Re: OpenGL text and Picolisp
Minor correction: On Tue, Jul 14, 2015 at 08:02:23AM +0200, Alexander Burger wrote: For example, if '_tex-num' is 4 and '_tex-ptr' is 'A', then this will evaluate to (A (32 N . 4)) meaning 'A' is the symbol to receive the pointer, 32 the total size of Should be: meaning 'A' is the symbol to receive the list of four pointers (numbers). You would call it as (glGenTextures 4 'A) BTW, don't forget to bind the symbol 'A', e.g.: (use A (glGenTextures 4 'A) .. ) ♪♫ Alex -- UNSUBSCRIBE: mailto:picolisp@software-lab.de?subject=Unsubscribe
OpenGL text and Picolisp
Hi, I've been writing a small opengl program using freeglut and the native C calls, however I run into problems when trying to read a texture in order to display text, specifically when calling glGenTextures expanded from the openGl.l in lib. (de glGenTextures (_tex-num _tex-ptr) (native `*GlutLib glGenTextures _tex-num (list _tex-ptr (4 . I)) ) It should store a pointer in _tex-ptr but when run it gives the error *** Error in /usr/bin/picolisp: free(): invalid next size (fast) Anyone has any experience working with opengl displaying text or had this error? I'm really clueless about how should one go about this in Pico. -- UNSUBSCRIBE: mailto:picolisp@software-lab.de?subject=Unsubscribe
