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@
@
@    Copyright 2010 TheSeven
@
@
@    This file is part of emCORE.
@
@    emCORE is free software: you can redistribute it and/or
@    modify it under the terms of the GNU General Public License as
@    published by the Free Software Foundation, either version 2 of the
@    License, or (at your option) any later version.
@
@    emCORE is distributed in the hope that it will be useful,
@    but WITHOUT ANY WARRANTY; without even the implied warranty of
@    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
@    See the GNU General Public License for more details.
@
@    You should have received a copy of the GNU General Public License
@    along with emCORE.  If not, see <http://www.gnu.org/licenses/>.
@
@


#define ASM_FILE
#include "global.h"


.section .icode.get_font_width, "ax", %progbits
.align 2
.global get_font_width
.type get_font_width, %function
get_font_width:
        mov     r0, #6
        mov     pc, lr
.size get_font_width, .-get_font_width


.section .icode.get_font_height, "ax", %progbits
.align 2
.global get_font_height
.type get_font_height, %function
get_font_height:
        mov     r0, #8
        mov     pc, lr
.size get_font_height, .-get_font_height


.section .icode.rendertext, "ax", %progbits
.align 2
.global rendertext
.type rendertext, %function
rendertext:
        stmfd   sp!, {r1-r8,lr}
        mov     r4, r0
        ldmfd   sp, {r5-r7}
        ldr     r0, [sp,#0x24]
        ldr     r1, [sp,#0x28]
        ldr     r8, [sp,#0x2c]
        stmia   sp, {r0,r1}
rendertext_loop:
        ldrb    r12, [r8], #1
        mov     r0, r4
        cmp     r12, #0
        mov     r1, r5
        beq     rendertext_done
        mov     r2, r6
        str     r12, [sp,#0x8]
        mov     r3, r7
        bl      renderchar
        add     r5, r5, #6
        b       rendertext_loop
rendertext_done:
        ldmfd   sp!, {r1-r8,pc}
.size rendertext, .-rendertext


.section .icode.renderchar, "ax", %progbits
.align 2
.global renderchar
.type renderchar, %function
.global renderchar_native
.type renderchar_native, %function
renderchar:
        stmfd   sp!, {r4-r9,lr}
        mla     r1, r2, r3, r1
        ldr     r2, [sp,#0x24]
        add     r1, r1, r1,lsl#1
        sub     r2, r2, #0x20
        add     r0, r0, r1
        adr     r7, renderchar_font
        cmp     r2, #0x5f
        add     r2, r2, r2,lsl#2
        mov     r1, #6
        addcc   r7, r7, r2
        ldr     r4, [sp,#0x1c]
        add     r3, r3, r3,lsl#1
        ldr     r5, [sp,#0x20]
renderchar_x:
        cmp     r1, #1
        mov     r2, #8
        ldrneb  lr, [r7], #1
renderchar_y:
        mov     r12, r5,lsr#24
        and     r9, r5, #0xff
        ldrb    r8, [r0]
        mul     r9, r12, r9
        rsb     r12, r12, #0xff
        tst     lr, #1
        mla     r8, r12, r8, r9
        movne   r12, r4,lsr#24
        andne   r9, r4, #0xff
        mov     r8, r8,lsr#8
        mulne   r9, r12, r9
        rsbne   r12, r12, #0xff
        mov     lr, lr,lsr#1
        mlane   r8, r12, r8, r9
        mov     r9, r5,lsr#8
        movne   r8, r8,lsr#8
        mov     r12, r5,lsr#24
        strb    r8, [r0]
        and     r9, r9, #0xff
        ldrb    r8, [r0,#1]
        mul     r9, r12, r9
        rsb     r12, r12, #0xff
        mla     r8, r12, r8, r9
        movne   r9, r4,lsr#8
        movne   r12, r4,lsr#24
        andne   r9, r9, #0xff
        mov     r8, r8,lsr#8
        mulne   r9, r12, r9
        rsbne   r12, r12, #0xff
        mlane   r8, r12, r8, r9
        mov     r12, r5,lsr#24
        mov     r9, r5,lsr#16
        movne   r8, r8,lsr#8
        and     r9, r9, #0xff
        strb    r8, [r0,#1]
        mul     r9, r12, r9
        ldrb    r8, [r0,#2]
        rsb     r12, r12, #0xff
        movne   r9, r4,lsr#16
        mla     r8, r12, r8, r9
        andne   r9, r9, #0xff
        movne   r12, r4,lsr#24
        mov     r8, r8,lsr#8
        mulne   r9, r12, r9
        rsbne   r12, r12, #0xff
        mlane   r8, r12, r8, r9
        movne   r8, r8,lsr#8
        subs    r2, r2, #1
        strb    r8, [r0,#2]
        add     r0, r0, r3
        bne     renderchar_y
        sub     r0, r0, r3,lsl#3
        subs    r1, r1, #1
        add     r0, r0, #3
        bne     renderchar_x
        ldmfd   sp!, {r4-r9,pc}

#if (LCD_BYTESPERPIXEL == 2)
renderchar_native:
        stmfd   sp!, {r4-r7,lr}
        ldr     r7, [sp,#0x14]
        cmn     r2, #1
        beq     renderchar_native_nobg
        mov     r6, r0
        mov     r4, #8
        mov     lr, r2,lsr#16
        sub     lr, lr, #0xff00
        subs    lr, lr, #0xff
        bne     renderchar_native_opaquerow
        mov     r12, r2,lsl#16
        mov     r12, r12,lsr#16
renderchar_native_blendrow:
        mov     r5, #6
renderchar_native_blendcol:
        ldrh    lr, [r6]
        movs    lr, lr,lsr#1
#ifdef LCD_BIGENDIAN
        orrcs   lr, lr, #0x10000
        bic     lr, lr, #0x1000
        bic     lr, lr, #0x84
#else
        bic     lr, lr, #0x410
#endif
        add     lr, lr, r12
        strh    lr, [r6], #2
        subs    r5, r5, #1
        bne     renderchar_native_blendcol
        add     r6, r6, r7,lsl#1
        sub     r6, r6, #12
        subs    r4, r4, #1
        bne     renderchar_native_blendrow
        b       renderchar_native_nobg
renderchar_native_opaquerow:
        mov     r5, #6
renderchar_native_opaquecol:
        strh    r2, [r6], #2
        subs    r5, r5, #1
        bne     renderchar_native_opaquecol
        add     r6, r6, r7,lsl#1
        sub     r6, r6, #12
        subs    r4, r4, #1
        bne     renderchar_native_opaquerow
renderchar_native_nobg:
        adr     r5, renderchar_font
        sub     r3, r3, #0x20
        cmp     r3, #0x5f
        addcc   r5, r3,lsl#2
        addcc   r5, r3
        mov     r3, #5
renderchar_native_col:
        mov     r6, r0
        ldrb    r4, [r5], #1
renderchar_native_row:
        tst     r4, #1
        strneh  r1, [r6]
        add     r6, r6, r7,lsl#1
        movs    r4, r4,lsr#1
        bne     renderchar_native_row
        add     r0, r0, #2
        subs    r3, r3, #1
        bne     renderchar_native_col
        add     r0, r0, #2
        ldmfd   sp!, {r4-r7,pc}
#else
#error Unknown number of bytes per pixel!
#endif

renderchar_font:
        .byte 0, 0, 0, 0, 0
        .byte 0, 0, 95, 0, 0
        .byte 0, 7, 0, 7, 0
        .byte 20, 127, 20, 127, 20
        .byte 36, 42, 127, 42, 18
        .byte 35, 19, 8, 100, 98
        .byte 54, 73, 85, 34, 80
        .byte 5, 3, 0, 0, 0
        .byte 28, 34, 65, 0, 0
        .byte 0, 0, 65, 34, 28
        .byte 20, 8, 62, 8, 20
        .byte 8, 8, 62, 8, 8
        .byte 0, -96, 96, 0, 0
        .byte 8, 8, 8, 8, 8
        .byte 0, 96, 96, 0, 0
        .byte 32, 16, 8, 4, 2
        .byte 62, 81, 73, 69, 62
        .byte 0, 66, 127, 64, 0
        .byte 66, 97, 81, 73, 70
        .byte 33, 65, 69, 75, 49
        .byte 24, 20, 18, 127, 16
        .byte 39, 69, 69, 69, 57
        .byte 60, 74, 73, 73, 48
        .byte 1, 113, 9, 5, 3
        .byte 54, 73, 73, 73, 54
        .byte 6, 73, 73, 41, 30
        .byte 0, 54, 54, 0, 0
        .byte 0, 86, 54, 0, 0
        .byte 8, 20, 34, 65, 0
        .byte 20, 20, 20, 20, 20
        .byte 0, 65, 34, 20, 8
        .byte 2, 1, 81, 9, 6
        .byte 50, 73, 121, 65, 62
        .byte 124, 18, 17, 18, 124
        .byte 127, 73, 73, 73, 62
        .byte 62, 65, 65, 65, 34
        .byte 127, 65, 65, 34, 28
        .byte 127, 73, 73, 73, 65
        .byte 127, 9, 9, 9, 1
        .byte 62, 65, 73, 73, 58
        .byte 127, 8, 8, 8, 127
        .byte 0, 65, 127, 65, 0
        .byte 32, 64, 65, 63, 1
        .byte 127, 8, 20, 34, 65
        .byte 127, 64, 64, 64, 64
        .byte 127, 2, 12, 2, 127
        .byte 127, 4, 8, 16, 127
        .byte 62, 65, 65, 65, 62
        .byte 127, 9, 9, 9, 6
        .byte 62, 65, 81, 33, 94
        .byte 127, 9, 25, 41, 70
        .byte 38, 73, 73, 73, 50
        .byte 1, 1, 127, 1, 1
        .byte 63, 64, 64, 64, 63
        .byte 31, 32, 64, 32, 31
        .byte 127, 32, 24, 32, 127
        .byte 99, 20, 8, 20, 99
        .byte 3, 4, 120, 4, 3
        .byte 97, 81, 73, 69, 67
        .byte 0, 127, 65, 65, 0
        .byte 2, 4, 8, 16, 32
        .byte 0, 65, 65, 127, 0
        .byte 4, 2, 1, 2, 4
        .byte 64, 64, 64, 64, 64
        .byte 1, 2, 4, 0, 0
        .byte 32, 84, 84, 84, 120
        .byte 127, 68, 68, 68, 56
        .byte 56, 68, 68, 68, 40
        .byte 56, 68, 68, 68, 127
        .byte 56, 84, 84, 84, 24
        .byte 8, 126, 9, 1, 2
        .byte 8, 84, 84, 84, 60
        .byte 127, 4, 4, 4, 120
        .byte 0, 68, 125, 64, 0
        .byte 32, 64, 64, 61, 0
        .byte 127, 16, 40, 68, 0
        .byte 0, 65, 127, 64, 0
        .byte 124, 4, 24, 4, 120
        .byte 124, 8, 4, 4, 120
        .byte 56, 68, 68, 68, 56
        .byte 124, 20, 20, 20, 24
        .byte 8, 20, 20, 20, 124
        .byte 124, 8, 4, 4, 8
        .byte 72, 84, 84, 84, 32
        .byte 4, 63, 68, 64, 32
        .byte 60, 64, 64, 32, 124
        .byte 28, 32, 64, 32, 28
        .byte 60, 64, 56, 64, 60
        .byte 68, 40, 16, 40, 68
        .byte 12, 80, 80, 80, 60
        .byte 68, 100, 84, 76, 68
        .byte 0, 8, 54, 65, 0
        .byte 0, 0, 119, 0, 0
        .byte 0, 65, 54, 8, 0
        .byte 2, 1, 2, 4, 2
.align 2
.size renderchar_native, .-renderchar_native