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Please review the following information to ;** ensure the GNU General Public License version 3.0 requirements will be ;** met: http://www.gnu.org/copyleft/gpl.html. ;** ;** If you are unsure which license is appropriate for your use, please ;** contact the sales department at http://qt.nokia.com/contact. ;** $QT_END_LICENSE$ ;** ;****************************************************************************/ ; ; W A R N I N G ; ------------- ; ; This file is not part of the Qt API. It exists purely as an ; implementation detail. This header file may change from version to ; version without notice, or even be removed. ; ; We mean it. ; ;----------------------------------------------------------------------------- ; Globals. ; Earch marcro expects that caller has loaded 0x800080 to r14. ;----------------------------------------------------------------------------- ComponentHalf EQU 0x800080 ;----------------------------------------------------------------------------- ; ARM assembly implementations of accelerated graphics operations. ; ; Conventions: ; ; - r0 = Target buffer pointer ; - r1 = Source buffer pointer ; - r2 = Length of the buffer to blend ; - r3 = Constant alpha for source buffer ; ;----------------------------------------------------------------------------- ; A macro for transparently defining ARM functions MACRO $func Function AREA Function_$func, CODE GLOBAL $func ALIGN 4 CODE32 $func MEND ;----------------------------------------------------------------------------- ; Armv6 boosted implementation of BYTE_MUL(...) function found in qdrawhelper_p.h. ; ; @param dst Destination register where to store the result ; @param x Value to multiply ; @param a Multiplicator byte ; @param r14 Component half 0x800080 ; ; @note Trashes x, r8 ;----------------------------------------------------------------------------- MACRO ByteMul $dst, $x, $a ; static inline uint BYTE_MUL(uint x, uint a) ; uint r8 = (x & 0xff00ff) * a + 0x800080 uxtb16 r8, $x ; r8 = r8 & 0x00FF00FF mla r8, r8, $a, r14 ; x = ((r >> 8) & 0xff00ff) * a + 0x800080 uxtb16 $x, $x, ror #8 mla $x, $x, $a, r14 ; r8 = (r8 + ((r8 >> 8) & 0xff00ff) ) >> 8 ; r8 &= 0xff00ff uxtab16 r8, r8, r8, ror #8 uxtb16 r8, r8, ror #8 ; x = x + ((x >>8) & 0xff00ff) uxtab16 $x, $x, $x, ror #8 ; x &= 0xff00ff00 ; x |= r8 uxtb16 $x, $x, ror #8 orr $dst, r8, $x, lsl #8 MEND ;----------------------------------------------------------------------------- ; Armv6 boosted implementation of INTERPOLATE_PIXEL_255(...) function found in ; qdrawhelper_p.h. ; ; @param dst Destination register where to store the result ; @param x First value to multiply ; @param a Multiplicator byte for first value ; @param y Second value to multiply ; @param b Multiplicator byte for second value ; @param r14 Component half 0x800080 ; ; ; @note Trashes x, r8, r14 ;----------------------------------------------------------------------------- MACRO InterpolatePixel255 $dst, $x, $a, $y, $b ; static inline uint INTERPOLATE_PIXEL_255(uint x, uint a, uint y, uint b) ; First calculate the parts where we need 0x800080 ; uint r8 = (((x & 0xff00ff) * a) + 0x800080) uxtb16 r8, $x ; r8 = r8 & 0x00FF00FF mla r8, r8, $a, r14 ; x = ((((x >> 8) & 0xff00ff) * a) + 0x800080) uxtb16 $x, $x, ror #8 mla $x, $x, $a, r14 ; Now we are trashing r14 to free it for other purposes ; uint r14 = (y & 0xff00ff) * b uxtb16 r14, $y ; r14 = y & 0x00FF00FF mul r14, r14, $b ; r8 = r8 + r14 add r8, r8, r14 ; r8 = (r8 + ((r8 >> 8) & 0xff00ff) ) >> 8 ; r8 &= 0xff00ff uxtab16 r8, r8, r8, ror #8 uxtb16 r8, r8, ror #8 ; r14 = ((y >> 8) & 0xff00ff) * b uxtb16 r14, $y, ror #8 ; r14 = ((y >> 8) & 0xFF00FF) mul r14, r14, $b ; x = x + r14 add $x, $x, r14 ; x = x + ((x >>8) & 0xff00ff) uxtab16 $x, $x, $x, ror #8 ; x &= 0xff00ff00 ; x |= r8 uxtb16 $x, $x, ror #8 orr $dst, r8, $x, lsl #8 MEND ;----------------------------------------------------------------------------- ; ;----------------------------------------------------------------------------- MACRO $label Blend4Pixels $BlendPixel ; Blend first 4 pixels ldmia r1!, {r4-r7} ldm r0, {r9-r12} b4p1_$label $BlendPixel r9, r4, r3 b4p2_$label $BlendPixel r10, r5, r3 b4p3_$label $BlendPixel r11, r6, r3 b4p4_$label $BlendPixel r12, r7, r3 stmia r0!, {r9-r12} MEND ;----------------------------------------------------------------------------- ; ;----------------------------------------------------------------------------- MACRO $label Blend8Pixels $BlendPixel b8p1_$label Blend4Pixels $BlendPixel b8p2_$label Blend4Pixels $BlendPixel MEND ;----------------------------------------------------------------------------- ; ;----------------------------------------------------------------------------- MACRO $label Blend16Pixels $BlendPixel b16p1_$label Blend8Pixels $BlendPixel b16p2_$label Blend8Pixels $BlendPixel MEND ;----------------------------------------------------------------------------- ; ;----------------------------------------------------------------------------- MACRO $label Blend32Pixels $BlendPixel b32p1_$label Blend16Pixels $BlendPixel b32p2_$label Blend16Pixels $BlendPixel MEND ;----------------------------------------------------------------------------- ; A macro for source over compositing one row of pixels and saving the results ; to destination buffer. ; ; @param dest Destination buffer (r0) ; @param src Source buffer (r1) ; @param length Length (r2) ; @param const_alpha Constant alpha (r3) ; @param r14 Component Half (0x800080) (r14) ; ; @note Advances r0, r1 ; @note Trashes r2, r4-r12 ;----------------------------------------------------------------------------- MACRO $label BlendRow $BlendPixel pld [r1] bloop_$label ; Blend 32 pixels per loop iteration subs r2, r2, #32 bmi b_remaining_$label brp1_$label Blend32Pixels $BlendPixel b bloop_$label b_remaining_$label ; Remaining 31 pixels addmi r2, r2, #32 ; Blend 16 pixels tst r2, #16 beq b_remaining8_$label brp2_$label Blend16Pixels $BlendPixel b_remaining8_$label ; Blend 8 pixels tst r2, #8 beq b_remaining4_$label brp3_$label Blend8Pixels $BlendPixel b_remaining4_$label ; Blend 4 pixels tst r2, #4 beq b_remaining3_$label brp4_$label Blend4Pixels $BlendPixel b_remaining3_$label ; Remaining 3 pixels tst r2, #2 beq b_last_$label ldmia r1!, {r4-r5} ldm r0, {r9-r10} brp5_$label $BlendPixel r9, r4, r3 brp6_$label $BlendPixel r10, r5, r3 stmia r0!, {r9-r10} b_last_$label tst r2, #1 beq bexit_$label ldr r4, [r1] ldr r9, [r0] bpl_$label $BlendPixel r9, r4, r3 str r9, [r0] bexit_$label MEND ;----------------------------------------------------------------------------- ; A macro for source over compositing one row of pixels and saving the results ; to destination buffer. Restores all registers. ; ; @param dest Destination buffer (r0) ; @param src Source buffer (r1) ; @param length Length (r2) ; @param const_alpha Constant alpha (r3) ; @param r14 Component Half (0x800080) (r14) ; ; @note Advances r0, r1 ; @note Trashes r2, r4-r12 ;----------------------------------------------------------------------------- MACRO $label BlendRowSafe $BlendPixel stmfd sp!, {r0-r6} ; Preserves registers only up to r6 brs_$label BlendRow $BlendPixel ldmfd sp!, {r0-r6} MEND ;----------------------------------------------------------------------------- ; Pix Copy. ; NOTE! Cache line size of ARM1136JF-S and ARM1136J-S is 32 bytes (8 pixels). ; ; @param dst Destination pixels (r0) ; @param src Source pixels (r1) ; @param len Length (r2) ; ; @note Trashes r3-r10 ;----------------------------------------------------------------------------- MACRO $label PixCpy $dst, $src, $len pld [$src] pcpy_loop_$label ; Copy 8 pixels per loop iteration pld [$src, #96] subs $len, $len, #8 ldmgeia $src!, {r3-r10} stmgeia $dst!, {r3-r10} bgt pcpy_loop_$label pcpy_remaining_$label ; Copy up to 7 remaining pixels ; Copy 4 pixels tst $len, #4 ldmneia $src!, {r3-r6} stmneia $dst!, {r3-r6} tst $len, #2 ldmneia $src!, {r3-r4} stmneia $dst!, {r3-r4} tst $len, #1 ldrne r3, [$src] strne r3, [$dst] MEND ;----------------------------------------------------------------------------- ; General Pix Copy. Maximum 8 pixels at time. Restores all registers. ; ; @param dst Destination pixels (r0) ; @param src Source pixels (r1) ; @param len Length (r2) ; ; @note Trashes r3-r10 ;----------------------------------------------------------------------------- MACRO $label PixCpySafe $dst, $src, $len stmfd sp!, {r0-r6} ; Preserves registers only up to r6 pcs_$label PixCpy $dst, $src, $len ldmfd sp!, {r0-r6} ; pop MEND ;----------------------------------------------------------------------------- ; A macro for source over compositing one pixel and saving the result to ; dst register. ; ; @param dst Destination register, must contain destination pixel upon entry ; @param src Source register, must contain source pixel upon entry ; @param const_alpha Constant source alpha ; @param r14 Component half 0x800080 ; ; @note Trashes const_alpha, r8 ;----------------------------------------------------------------------------- MACRO $label PixelSourceOver $dst, $src, $const_alpha ; Negate src and extract alpha mvn $const_alpha, $src ; bitwise not uxtb $const_alpha, $const_alpha, ror #24 ; r3 = ((r3 & 0xFF000000) >> 24); ;cmp $const_alpha, #255 ; test for full transparency ( negated ) ;beq exit_$label cmp $const_alpha, #0 ; test for full opacity ( negated ) moveq $dst, $src beq exit_$label ByteMul $dst, $dst, $const_alpha add $dst, $src, $dst exit_$label MEND ;----------------------------------------------------------------------------- ; A macro for source over compositing one pixel and saving the result to ; dst register. ; ; @param dst Destination register, must contain destination pixel upon entry ; @param src Source register, must contain source pixel upon entry ; @param const_alpha Constant source alpha ; @param r14 Component half 0x800080 ; ; @note Trashes src, const_alpha, r8 ;----------------------------------------------------------------------------- MACRO $label PixelSourceOverConstAlpha $dst, $src, $const_alpha ; store alpha because we are going to trash it stmfd sp!, {$const_alpha} ByteMul $src, $src, $const_alpha ; Negate src and extract alpha mvn $const_alpha, $src ; bitwise not uxtb $const_alpha, $const_alpha, ror #24 ; r3 = ((r3 & 0xFF000000) >> 24); ByteMul $dst, $dst, $const_alpha add $dst, $src, $dst ; recover alpha ldmfd sp!, {$const_alpha} MEND ;----------------------------------------------------------------------------- ; A macro for source over compositing one pixel and saving the result to ; a register. ; ; @param dst Destination register, must contain destination pixel upon entry ; @param src Source register, must contain source pixel upon entry ; @param const_alpha Constant source alpha ; @param r14 Component half 0x800080 ; ; @note Trashes src, r8 ;----------------------------------------------------------------------------- MACRO $label PixelSourceConstAlpha $dst, $src, $const_alpha ; store r2 and r14 because we are going to trash them stmfd sp!, {r2, r14} rsb r2, $const_alpha, #255 InterpolatePixel255 $dst, $src, $const_alpha, $dst, r2 ; recover r2 and r14 ldmfd sp!, {r2, r14} MEND END ; File end