X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;ds=sidebyside;f=gp2x%2Fvideo_blend.S;fp=gp2x%2Fvideo_blend.S;h=0000000000000000000000000000000000000000;hb=d5e0983c10e0ca717603dd1a406ff0d6e450e905;hp=63a54800e09d6986a6242bf1202d619c7f952bb3;hpb=c3c98c2f7c4d6cb73d3f038e2730ebe791d4492e;p=gpsp.git diff --git a/gp2x/video_blend.S b/gp2x/video_blend.S deleted file mode 100644 index 63a5480..0000000 --- a/gp2x/video_blend.S +++ /dev/null @@ -1,181 +0,0 @@ -.align 2 - -.global expand_blend -.global expand_normal - -@ Input: -@ r0 = screen_src_ptr -@ r1 = screen_dest_ptr -@ r2 = start -@ r3 = end - -6: - .word io_registers - .word palette_ram_converted - .word 0x04000200 @ combine test mask - .word 0x07E0F81F @ clamp mask - .word 0x000003FE @ palette index mask - .word 0x08010020 @ saturation mask - -expand_blend: - stmdb sp!, { r4, r5, r6, r9, r10, r11, r14 } - - add r0, r0, r2, lsl #2 @ screen_src_ptr += start - add r1, r1, r2, lsl #1 @ screen_dest_ptr += start - sub r2, r3, r2 @ r2 = end - start - ldr r3, 6b @ r3 = io_registers - ldr r3, [r3, #0x52] @ r3 = bldalpha - mov r4, r3, lsr #8 @ r4 = bldalpha >> 8 - and r3, r3, #0x1F @ r3 = blend_a - and r4, r4, #0x1F @ r4 = blend_b - cmp r3, #16 @ if(blend_a > 16) - movgt r3, #16 @ blend_a = 16 - cmp r4, #16 @ if(blend_b > 16) - movgt r3, #16 @ blend_b = 16 - - ldr r14, 6b + 4 @ r14 = palette_ram_converted - ldr r12, 6b + 8 @ r12 = 0x04000200 - ldr r11, 6b + 12 @ r11 = 0x07E0F81F - ldr r10, 6b + 16 @ r10 = 0x000003FE - - add r5, r3, r4 @ r5 = blend_a + blend_b - cmp r5, #16 @ if((blend_a + blend_b) > 16) - bgt 3f @ goto loop w/saturation - - - @ loop w/o saturation -1: - ldr r5, [r0], #4 @ r5 = pixel_pair, screen_src_ptr++ - and r6, r5, r12 @ r6 = r5 & 0x04000200 - cmp r6, r12 @ if(r6 != 0x4000200) - bne 2f @ goto no_blend - - and r6, r10, r5, lsl #1 @ r6 = (pixel_pair & 0x1FF) << 1 - ldrh r6, [r14, r6] @ r6 = pixel_top - orr r6, r6, r6, lsl #16 @ r6 = pixel_top | (pixel_top << 16) - and r6, r6, r11 @ r6 = pixel_top_dilated - - and r5, r10, r5, lsr #15 @ r5 = ((pixel_pair >> 16) & 0x1FF) << 1 - ldrh r5, [r14, r5] @ r5 = pixel_bottom - orr r5, r5, r5, lsl #16 @ r5 = pixel_bottom | (pixel_bottom << 16) - and r5, r5, r11 @ r5 = pixel_bottom_dilated - - mul r5, r4, r5 @ r5 = pixel_bottom * blend_b = bottom_mul - mla r5, r3, r6, r5 @ r5 = (pixel_top * blend_a) + bottom_mul - - and r5, r11, r5, lsr #4 @ r5 = (color_dilated >> 4) & 0x07E0F81F - orr r5, r5, r5, lsr #16 @ r5 = color_dilated | (color_dilated >> 16) - - strh r5, [r1], #2 @ *screen_dest_ptr = r5, screen_dest_ptr++ - subs r2, r2, #1 @ counter-- - bne 1b @ go again - - ldmia sp!, { r4, r5, r6, r9, r10, r11, pc } - -2: - and r5, r10, r5, lsl #1 @ r5 = (pixel_pair & 0x1FF) << 1 - ldrh r5, [r14, r5] @ r5 = pixel_top - strh r5, [r1], #2 @ *screen_dest_ptr = r5, screen_dest_ptr++ - - subs r2, r2, #1 @ counter-- - bne 1b @ go again - - ldmia sp!, { r4, r5, r6, r9, r10, r11, pc } - -@ loop w/saturation - -3: - ldr r9, 6b + 20 @ r9 = 0x08010020 - -4: - ldr r5, [r0], #4 @ r5 = pixel_pair, screen_src_ptr++ - and r6, r5, r12 @ r6 = r5 & 0x04000200 - cmp r6, r12 @ if(r6 != 0x4000200) - bne 5f @ goto no_blend - - and r6, r10, r5, lsl #1 @ r6 = (pixel_pair & 0x1FF) << 1 - ldrh r6, [r14, r6] @ r6 = pixel_top - orr r6, r6, r6, lsl #16 @ r6 = pixel_top | (pixel_top << 16) - and r6, r6, r11 @ r6 = pixel_top_dilated - - and r5, r10, r5, lsr #15 @ r5 = ((pixel_pair >> 16) & 0x1FF) << 1 - ldrh r5, [r14, r5] @ r5 = pixel_bottom - orr r5, r5, r5, lsl #16 @ r5 = pixel_bottom | (pixel_bottom << 16) - and r5, r5, r11 @ r5 = pixel_bottom_dilated - - mul r5, r4, r5 @ r5 = pixel_bottom * blend_b = bottom_mul - mla r5, r3, r6, r5 @ r5 = (pixel_top * blend_a) + bottom_mul - - and r6, r9, r5, lsr #4 @ r6 = saturation bits - orr r6, r6, r6, lsr #1 @ propogate saturation down msb - orr r6, r6, r6, lsr #2 @ propogate down next two bits - orr r6, r6, r6, lsr #3 @ propogate down next three bits - orr r5, r6, r5, lsr #4 @ mask over result w/saturation - - and r5, r11, r5 @ r5 = (color_dilated >> 4) & 0x07E0F81F - orr r5, r5, r5, lsr #16 @ r5 = color_dilated | (color_dilated >> 16) - strh r5, [r1], #2 @ *screen_dest_ptr = r5, screen_dest_ptr++ - - subs r2, r2, #1 @ counter-- - bne 4b @ go again - - ldmia sp!, { r4, r5, r6, r9, r10, r11, pc } - -5: - and r5, r10, r5, lsl #1 @ r5 = (pixel_pair & 0x1FF) << 1 - ldrh r5, [r14, r5] @ r5 = pixel_top - strh r5, [r1], #2 @ *screen_dest_ptr = r5, screen_dest_ptr++ - - subs r2, r2, #1 @ counter-- - bne 4b @ go again - - ldmia sp!, { r4, r5, r6, r9, r10, r11, pc } - - - -@ The following function isn't complete (only works on run multiples of 8), -@ but unfortunately I don't see much potential for actually being able to -@ use it.. - -#define expand_pixel_pair(reg, temp) ;\ - and temp, r3, reg, lsr #15 ;\ - ldrh temp, [r2, temp] ;\ - ;\ - and reg, r3, reg, lsl #1 ;\ - ldrh reg, [r2, reg] ;\ - ;\ - orr reg, reg, temp, lsl #16 ;\ - - -@ Input: -@ r0 = screen_ptr -@ r1 = start -@ r2 = end - -1: - .word palette_ram_converted - .word 0x3FE - -expand_normal: - stmdb sp!, { r4, r5, r6, r7, r14 } - - add r0, r0, r1, lsl #1 @ screen_ptr += start - sub r1, r2, r1 @ r1 = end - start - ldr r2, 1b @ r2 = palette_ram_converted - ldr r3, 1b + 4 @ r3 = 0x3FE - -2: - ldmia r0, { r4, r5, r6, r7 } - - expand_pixel_pair(r4, r14) - expand_pixel_pair(r5, r14) - expand_pixel_pair(r6, r14) - expand_pixel_pair(r7, r14) - - stmia r0!, { r4, r5, r6, r7 } - - subs r1, r1, #8 - bne 2b - - ldmia sp!, { r4, r5, r6, r7, pc } -