diff options
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/display/sm501.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/hw/display/sm501.c b/hw/display/sm501.c index 8bf4d111f4..e7a9f77de7 100644 --- a/hw/display/sm501.c +++ b/hw/display/sm501.c @@ -750,6 +750,7 @@ static void sm501_2d_operation(SM501State *s) switch (cmd) { case 0: /* BitBlt */ { + static uint32_t tmp_buf[16384]; unsigned int src_x = (s->twoD_source >> 16) & 0x01FFF; unsigned int src_y = s->twoD_source & 0xFFFF; uint32_t src_base = s->twoD_source_base & 0x03FFFFFF; @@ -812,10 +813,14 @@ static void sm501_2d_operation(SM501State *s) de = db + width + height * (width + dst_pitch); if (rtl && ((db >= sb && db <= se) || (de >= sb && de <= se))) { /* regions may overlap: copy via temporary */ - int llb = width * (1 << format); + int free_buf = 0, llb = width * (1 << format); int tmp_stride = DIV_ROUND_UP(llb, sizeof(uint32_t)); - uint32_t *tmp = g_malloc(tmp_stride * sizeof(uint32_t) * - height); + uint32_t *tmp = tmp_buf; + + if (tmp_stride * sizeof(uint32_t) * height > sizeof(tmp_buf)) { + tmp = g_malloc(tmp_stride * sizeof(uint32_t) * height); + free_buf = 1; + } pixman_blt((uint32_t *)&s->local_mem[src_base], tmp, src_pitch * (1 << format) / sizeof(uint32_t), tmp_stride, 8 * (1 << format), 8 * (1 << format), @@ -825,7 +830,9 @@ static void sm501_2d_operation(SM501State *s) dst_pitch * (1 << format) / sizeof(uint32_t), 8 * (1 << format), 8 * (1 << format), 0, 0, dst_x, dst_y, width, height); - g_free(tmp); + if (free_buf) { + g_free(tmp); + } } else { pixman_blt((uint32_t *)&s->local_mem[src_base], (uint32_t *)&s->local_mem[dst_base], |