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Merge pull request #5209 from cam900/igs017_igs031_gfx

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igs017_igs031.cpp : Reduce usage of gfx_element
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R. Belmont 2019-06-11 09:39:42 -04:00 committed by GitHub
commit 65edd05db2
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2 changed files with 63 additions and 12 deletions
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73
src/mame/video/igs017_igs031.cpp
View File

@ -254,26 +254,77 @@ void igs017_igs031_device::expand_sprites()
***************************************************************************/
void igs017_igs031_device::draw_sprite(bitmap_ind16 &bitmap, const rectangle &cliprect, int sx, int sy, int dimx, int dimy, int flipx, int flipy, u32 color, u32 addr)
void igs017_igs031_device::draw_sprite(bitmap_ind16 &bitmap, const rectangle &cliprect, int offsx, int offsy, int dimx, int dimy, int flipx, int flipy, u32 color, u32 addr)
{
// prepare GfxElement on the fly
// Bounds checking
if (addr + dimx * dimy >= m_sprites_gfx_size)
return;
gfx_element gfx(m_palette, m_sprites_gfx.get() + addr, dimx, dimy, dimx, m_palette->entries(), 0x100, 32);
/* Start drawing */
const u16 pal = 0x100 + (color << 5);
const u8 *source_base = &m_sprites_gfx[addr];
const u8 transparent_color = 0x1f;
gfx.transpen(bitmap, cliprect,
0, color,
flipx, flipy,
sx, sy, 0x1f);
int xinc = flipx ? -1 : 1;
int yinc = flipy ? -1 : 1;
int x_index_base = flipx ? dimx - 1 : 0;
int y_index = flipy ? dimy - 1 : 0;
// start coordinates
int sx = offsx;
int sy = offsy;
// end coordinates
int ex = sx + dimx;
int ey = sy + dimy;
if (sx < cliprect.min_x)
{ // clip left
int pixels = cliprect.min_x - sx;
sx += pixels;
x_index_base += xinc * pixels;
}
if (sy < cliprect.min_y)
{ // clip top
int pixels = cliprect.min_y - sy;
sy += pixels;
y_index += yinc * pixels;
}
// NS 980211 - fixed incorrect clipping
if (ex > cliprect.max_x + 1)
{ // clip right
ex = cliprect.max_x + 1;
}
if (ey > cliprect.max_y + 1)
{ // clip bottom
ey = cliprect.max_y + 1;
}
if (ex > sx)
{ // skip if inner loop doesn't draw anything
for (int y = sy; y < ey; y++)
{
const u8 *source = source_base + y_index * dimx;
u16 *dest = &bitmap.pix16(y);
int x_index = x_index_base;
for (int x = sx; x < ex; x++)
{
const u8 c = source[x_index];
if (c != transparent_color)
dest[x] = pal + c;
x_index += xinc;
}
y_index += yinc;
}
}
}
void igs017_igs031_device::draw_sprites(bitmap_ind16 &bitmap,const rectangle &cliprect)
{
u8 *s = m_spriteram;
u8 *end = m_spriteram + 0x800;
const u8 *s = m_spriteram;
const u8 *end = m_spriteram + 0x800;
for (; s < end; s += 8)
{
@ -296,7 +347,7 @@ void igs017_igs031_device::draw_sprites(bitmap_ind16 &bitmap,const rectangle &cl
if (sy == -0x200)
break;
u32 color = (s[7] & 0xe0) >> 5;
const u32 color = (s[7] & 0xe0) >> 5;
draw_sprite(bitmap, cliprect, sx, sy, dimx, dimy, flipx, flipy, color, addr);
}

2
src/mame/video/igs017_igs031.h
View File

@ -50,7 +50,7 @@ public:
void bg_w(offs_t offset, u8 data);
void expand_sprites();
void draw_sprite(bitmap_ind16 &bitmap, const rectangle &cliprect, int sx, int sy, int dimx, int dimy, int flipx, int flipy, u32 color, u32 addr);
void draw_sprite(bitmap_ind16 &bitmap, const rectangle &cliprect, int offsx, int offsy, int dimx, int dimy, int flipx, int flipy, u32 color, u32 addr);
void draw_sprites(bitmap_ind16 &bitmap, const rectangle &cliprect);
int debug_viewer(bitmap_ind16 &bitmap, const rectangle &cliprect);
u32 screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);