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First cut at LORES80 graphics

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- This comes with the caveat that all video modes will need to be refactored to take into account proper timing
This commit is contained in:
Aaron Culliney 2016-01-16 23:14:17 -08:00
parent 090f5f4db4
commit edfd5243ff
2 changed files with 87 additions and 3 deletions
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84
src/display.c
View File

@ -593,6 +593,20 @@ static inline void _plot_lores(uint8_t **d, const uint32_t val) {
*((uint16_t *)(*d)) = (uint16_t)(val & 0xffff);
}
static inline void _plot_dlores(uint8_t **d, const uint32_t val) {
*((uint32_t *)(*d)) = val;
*d += 4;
*((uint16_t *)(*d)) = (uint16_t)val;
*d += 2;
*((uint8_t *)(*d)) = (uint8_t)val;
*d += SCANDSTEP;
*((uint32_t *)(*d)) = val;
*d += 4;
*((uint16_t *)(*d)) = (uint16_t)val;
*d += 2;
*((uint8_t *)(*d)) = (uint8_t)val;
}
static inline void _plot_character(const unsigned int font_off, uint8_t *fb_ptr) {
video_setDirty();
uint8_t *font_ptr = video__wider_font+font_off;
@ -679,6 +693,42 @@ static inline void _plot_block1(uint16_t ea, uint8_t b)
_plot_block(b, video__fb2+video__screen_addresses[ea-0x0800]);
}
static inline void _plot_dblock(const uint8_t val, uint8_t *fb_ptr) {
uint8_t color = (val & 0x0F) << 4;
uint32_t val32 = (color << 24) | (color << 16) | (color << 8) | color;
_plot_dlores(/*dst*/&fb_ptr, val32);
fb_ptr += SCANDSTEP;
_plot_dlores(/*dst*/&fb_ptr, val32);
fb_ptr += SCANDSTEP;
_plot_dlores(/*dst*/&fb_ptr, val32);
fb_ptr += SCANDSTEP;
_plot_dlores(/*dst*/&fb_ptr, val32);
fb_ptr += SCANDSTEP;
color = val & 0xF0;
val32 = (color << 24) | (color << 16) | (color << 8) | color;
_plot_dlores(/*dst*/&fb_ptr, val32);
fb_ptr += SCANDSTEP;
_plot_dlores(/*dst*/&fb_ptr, val32);
fb_ptr += SCANDSTEP;
_plot_dlores(/*dst*/&fb_ptr, val32);
fb_ptr += SCANDSTEP;
_plot_dlores(/*dst*/&fb_ptr, val32);
}
/* plot double-lores block first page */
static inline void _plot_dblock0(uint16_t ea, uint8_t b, bool odd) {
uint8_t *fb = video__fb1+video__screen_addresses[ea-0x0400] + (odd ? 7 : 0);
_plot_dblock(b, fb);
}
static inline void _plot_dblock1(uint16_t ea, uint8_t b, bool odd) {
uint8_t *fb = video__fb2+video__screen_addresses[ea-0x0800] + (odd ? 7 : 0);
_plot_dblock(b, fb);
}
static inline void _draw_text(uint16_t ea, uint8_t b, int page, uint32_t sw, uint32_t flags) {
if (softswitches & flags) {
if (softswitches & SS_80COL) {
@ -694,11 +744,45 @@ static inline void _draw_text(uint16_t ea, uint8_t b, int page, uint32_t sw, uin
if (softswitches & (SS_HIRES|sw)) {
/* ??? */
} else {
if (!(softswitches & SS_80COL)) {
void (*plotBlockFn)(uint16_t, uint8_t) = !page ? _plot_block0 : _plot_block1;
if (!(softswitches & SS_DHIRES)) {
// LORES40 ...
plotBlockFn(ea, b);
} else {
// TODO : abnormal LORES output. See UTAIIe : 8-28
plotBlockFn(ea, b);
}
} else {
if (softswitches & SS_DHIRES) {
// LORES80 ...
void (*plotBlockFn)(uint16_t, uint8_t, bool) = !page ? _plot_dblock0 : _plot_dblock1;
// plot even half-block from auxmem, rotate nybbles to match color (according to UTAIIe)
b = apple_ii_64k[1][ea];
uint8_t b0 = (b & 0x0F);
uint8_t b1 = (b & 0xF0) >> 4;
uint8_t rot0 = ((b0 & 0x8) >> 3);
uint8_t rot1 = ((b1 & 0x8) >> 3);
b0 = (((b0<<5) | (rot0<<4)) >> 4);
b1 = ((b1<<5) | (rot1<<4));
b = b0 | b1;
plotBlockFn(ea, b, false);
// plot odd half-block from main mem
b = apple_ii_64k[0][ea];
plotBlockFn(ea, b, true);
video_setDirty();
} else {
/* ??? */
void (*plotBlockFn)(uint16_t, uint8_t) = !page ? _plot_block0 : _plot_block1;
plotBlockFn(ea, b);
}
}
}
}
}
GLUE_C_WRITE(video__write_2e_text0)
{

2
src/test/testdisplay.c
View File

@ -293,7 +293,7 @@ TEST test_80col_lores() {
c_debugger_go();
ASSERT(apple_ii_64k[0][WATCHPOINT_ADDR] == TEST_FINISHED);
ASSERT_SHA("18C69AEA1510485839F9724AFB54F74C4991FCCB");
ASSERT_SHA("93E46FFBCE7D3890419961A64BC22949C8C44121");
PASS();
}