From 5531c1c36ca9faae7959d7308fa7a8158ea3f8b1 Mon Sep 17 00:00:00 2001
From: IgorA <IgorA@kolibrios.org>
Date: Wed, 9 Sep 2020 11:56:39 +0000
Subject: [PATCH] add function 'gluPerspective', fix function 'glFrustum'

git-svn-id: svn://kolibrios.org@8059 a494cfbc-eb01-0410-851d-a64ba20cac60
---
 .../develop/libraries/TinyGL/asm_fork/api.asm | 22 +++-----
 .../TinyGL/asm_fork/examples/gears.asm        | 56 +++++++++++++------
 .../libraries/TinyGL/asm_fork/export.inc      |  1 +
 .../develop/libraries/TinyGL/asm_fork/glu.asm | 47 +++++++++++++++-
 4 files changed, 93 insertions(+), 33 deletions(-)

diff --git a/programs/develop/libraries/TinyGL/asm_fork/api.asm b/programs/develop/libraries/TinyGL/asm_fork/api.asm
index f40e7494aa..e1a04b96b8 100644
--- a/programs/develop/libraries/TinyGL/asm_fork/api.asm
+++ b/programs/develop/libraries/TinyGL/asm_fork/api.asm
@@ -538,29 +538,23 @@ endl
 endp
 
 align 4
-proc glFrustum uses eax, left:dword,right:dword,bottom:dword,top:dword,\
-	near:dword,farv:dword
+proc glFrustum uses eax, left:qword, right:qword, bottom:qword, top:qword,\
+	near:qword, farv:qword
 locals
 	p rd 7
 endl
 	mov dword[p],OP_Frustum
-	mov eax,[left]
-	fld qword[eax]
+	fld qword[left]
 	fstp dword[p+4]
-	mov eax,[right]
-	fld qword[eax]
+	fld qword[right]
 	fstp dword[p+8]
-	mov eax,[bottom]
-	fld qword[eax]
+	fld qword[bottom]
 	fstp dword[p+12]
-	mov eax,[top]
-	fld qword[eax]
+	fld qword[top]
 	fstp dword[p+16]
-	mov eax,[near]
-	fld qword[eax]
+	fld qword[near]
 	fstp dword[p+20]
-	mov eax,[farv]
-	fld qword[eax]
+	fld qword[farv]
 	fstp dword[p+24]
 
 	mov eax,ebp
diff --git a/programs/develop/libraries/TinyGL/asm_fork/examples/gears.asm b/programs/develop/libraries/TinyGL/asm_fork/examples/gears.asm
index 035e1c772e..0654bef898 100644
--- a/programs/develop/libraries/TinyGL/asm_fork/examples/gears.asm
+++ b/programs/develop/libraries/TinyGL/asm_fork/examples/gears.asm
@@ -1,5 +1,5 @@
 use32
-	org 0x0
+	org 0
 	db 'MENUET01'
 	dd 1,start,i_end,mem,stacktop,0,cur_dir_path
 
@@ -18,6 +18,13 @@ macro matr_cell c_funct,c_param,funct,param, dia
 	dia dword[esp-4*(c_param*(c_funct-funct)+(1+c_param-param))]
 }
 
+;Так как некоторые извращенческие функции OpenGL воспринимают только параметры
+;типа double (8 байт) то придется пихать их в стек макросом glpush
+macro glpush GLDoubleVar {
+	push dword[GLDoubleVar+4]
+	push dword[GLDoubleVar]
+}
+
 align 4
 start:
 	load_library name_tgl, cur_dir_path, library_path, system_path, \
@@ -65,6 +72,21 @@ start:
 align 4
 red_win:
 	call draw_window
+	mcall SF_THREAD_INFO,procinfo,-1
+	mov eax,dword[procinfo.box.height]
+	cmp eax,120
+	jge @f
+		mov eax,120 ;min size
+	@@:
+	sub eax,42
+	mov ebx,dword[procinfo.box.width]
+	cmp ebx,200
+	jge @f
+		mov ebx,200
+	@@:
+	sub ebx,10
+		stdcall reshape, ebx,eax
+	.end0:
 
 align 16
 still:
@@ -93,12 +115,11 @@ a2 dd 0.3
 
 ; new window size or exposure
 align 4
-proc reshape uses ebx ecx, width:dword, height:dword
+proc reshape, width:dword, height:dword
 locals
 	h dq ?
 	mh dq ?
 endl
-
 	stdcall [glViewport], 0, 0, [width], [height]
 	stdcall [glMatrixMode], GL_PROJECTION
 	stdcall [glLoadIdentity]
@@ -107,11 +128,15 @@ endl
 	fst qword[h] ;h = height / width
 	fchs
 	fstp qword[mh]
-	mov ebx,ebp
-	sub ebx,8
-	mov ecx,ebp
-	sub ecx,16
-	stdcall [glFrustum], dword p1, dword p2, ebx, ecx, dword p5, dword p6
+	
+	glpush p6
+	glpush p5
+	glpush h
+	glpush mh
+	glpush p2
+	glpush p1
+	call [glFrustum]
+	
 	stdcall [glMatrixMode], GL_MODELVIEW
 	stdcall [glLoadIdentity]
 	stdcall [glTranslatef], 0.0, 0.0, -40.0
@@ -198,7 +223,6 @@ key:
 		fstp dword[view_roty]
 		call draw_3d
 	@@:
-
 	jmp still
 
 align 4
@@ -220,10 +244,6 @@ title3: db 'ESC - exit   Arrow keys - rotate   +/- zoom'
 fps:	db 'FPS:'
 .end: db 0
 
-align 4
-ctx1 db 28 dup (0) ;TinyGLContext or KOSGLContext
-;sizeof.TinyGLContext = 28
-
 align 16
 draw_3d:
 	stdcall [glClear], GL_COLOR_BUFFER_BIT + GL_DEPTH_BUFFER_BIT
@@ -887,14 +907,18 @@ include '../export.inc'
 ;--------------------------------------------------
 system_path db '/sys/lib/'
 name_tgl db 'tinygl.obj',0
-err_message_found_lib db 'Sorry I cannot load library tinygl.obj',0
+
 head_f_i:
-head_f_l db 'System error',0
-err_message_import db 'Error on load import library tinygl.obj',0
+head_f_l db '"System error',0
+err_message_import db 'Error on load import library ',39,'tinygl.obj',39,'" -tE',0
+err_message_found_lib db 'Sorry I cannot load library ',39,'tinygl.obj',39,'" -tE',0
 ;--------------------------------------------------
 
 align 16
 i_end:
+ctx1 db 28 dup (0) ;TinyGLContext or KOSGLContext
+;sizeof.TinyGLContext = 28
+procinfo process_information 
 	rb 4096
 stacktop:
 cur_dir_path:
diff --git a/programs/develop/libraries/TinyGL/asm_fork/export.inc b/programs/develop/libraries/TinyGL/asm_fork/export.inc
index 0e01ffd52c..b778087cc3 100644
--- a/programs/develop/libraries/TinyGL/asm_fork/export.inc
+++ b/programs/develop/libraries/TinyGL/asm_fork/export.inc
@@ -161,6 +161,7 @@ E_LIB glClose ;(void)
 ; glu functions
 ;
 
+E_LIB gluPerspective ;(double, double, double, double)
 E_LIB gluNewQuadric
 E_LIB gluDeleteQuadric
 E_LIB gluQuadricDrawStyle
diff --git a/programs/develop/libraries/TinyGL/asm_fork/glu.asm b/programs/develop/libraries/TinyGL/asm_fork/glu.asm
index 0f4ff83f63..f98cc52f94 100644
--- a/programs/develop/libraries/TinyGL/asm_fork/glu.asm
+++ b/programs/develop/libraries/TinyGL/asm_fork/glu.asm
@@ -12,6 +12,13 @@ offs_qobj_TextureFlag equ 8
 offs_qobj_Normals equ 12
 offs_qobj_ErrorFunc equ 16
 
+;Так как некоторые извращенческие функции OpenGL воспринимают только параметры
+;типа double (8 байт) то придется пихать их в стек макросом glpush
+macro glpush GLDoubleVar {
+	push dword[GLDoubleVar+4]
+	push dword[GLDoubleVar]
+}
+
 ;void drawTorus(float rc, int numc, float rt, int numt)
 ;{
 ;}
@@ -20,9 +27,43 @@ offs_qobj_ErrorFunc equ 16
 ;{
 ;}
 
-;void gluPerspective(GLdouble fovy, GLdouble aspect, GLdouble zNear, GLdouble zFar )
-;{
-;}
+align 4
+an360f dd 360.0
+
+align 16
+proc gluPerspective, fovy:qword, aspect:qword, zNear:qword, zFar:qword
+locals
+	mfW dq ?
+	fW dq ?
+	mfH dq ?
+	fH dq ?
+endl
+	fldpi
+	fmul qword[fovy]
+	fdiv dword[an360f]
+	fptan
+	ffree st0 ;выкидываем 1.0 которая осталось после вычисления тангенса
+	fincstp
+	fmul qword[zNear]
+	fld st0
+	fchs
+	fstp qword[mfH]
+	fst qword[fH]
+	fmul qword[aspect]
+	fld st0
+	fchs
+	fstp qword[mfW]
+	fstp qword[fW]
+
+	glpush zFar
+	glpush zNear
+	glpush fH
+	glpush mfH
+	glpush fW
+	glpush mfW
+	call glFrustum
+	ret
+endp
 
 ;void gluLookAt(GLdouble eyex, GLdouble eyey, GLdouble eyez,
 ;	  GLdouble centerx, GLdouble centery, GLdouble centerz,