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exynos: font: slight improvement to rendering performance

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The current bottleneck is 'put_glyph_rgba4444'. Interpolate mode
enables us to remove the conditional in the inner loop.

Eventually this call should just reduce to a memcpy.
This commit is contained in:
Tobias Jakobi 2014-07-23 18:09:42 +02:00
parent 987da33104
commit cd8161df6c
1 changed files with 8 additions and 8 deletions
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16
gfx/exynos_gfx.c
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@ -166,10 +166,6 @@ struct exynos_data {
#endif
};
static inline void put_pixel_argb4444(uint16_t *p, uint8_t r, uint8_t g, uint8_t b, uint8_t a) {
*p = (b >> 4) | ((g >> 4) << 4) | ((r >> 4) << 8) | ((a >> 4) << 12);
}
static inline unsigned align_common(unsigned i, unsigned j) {
return (i + j - 1) & ~(j - 1);
}
@ -377,7 +373,7 @@ static int clear_buffer(struct g2d_context *g2d, struct g2d_image *img) {
}
/* Put a font glyph at a position in the buffer that is backing the G2D font image object. */
static void put_glyph_rgba4444(struct exynos_data *pdata, const uint8_t *src, uint8_t *f_rgb,
static void put_glyph_rgba4444(struct exynos_data *pdata, const uint8_t *src, uint16_t color,
unsigned g_width, unsigned g_height, unsigned g_pitch,
unsigned dst_x, unsigned dst_y) {
const enum exynos_image_type buf_type = defaults[exynos_image_font].buf_type;
@ -390,9 +386,9 @@ static void put_glyph_rgba4444(struct exynos_data *pdata, const uint8_t *src, ui
for (y = 0; y < g_height; ++y, src += g_pitch, dst += buf_width) {
for (x = 0; x < g_width; ++x) {
const uint8_t blend = src[x];
const uint16_t blend = src[x];
if (blend != 0) put_pixel_argb4444(&dst[x], f_rgb[0], f_rgb[1], f_rgb[2], blend);
dst[x] = color | ((blend << 8) & 0xf000);
}
}
}
@ -1117,6 +1113,10 @@ static int exynos_render_msg(struct exynos_video *vid,
int msg_base_x = g_settings.video.msg_pos_x * dst->width;
int msg_base_y = (1.0f - g_settings.video.msg_pos_y) * dst->height;
const uint16_t color = (vid->font_rgb[2] >> 4) |
((vid->font_rgb[1] >> 4) << 4) |
((vid->font_rgb[0] >> 4) << 8);
if (vid->font == NULL || vid->font_driver == NULL)
return -1;
@ -1158,7 +1158,7 @@ static int exynos_render_msg(struct exynos_video *vid,
if (glyph_width > max_width) glyph_width = max_width;
if (glyph_height > max_height) glyph_height = max_height;
put_glyph_rgba4444(pdata, src, vid->font_rgb,
put_glyph_rgba4444(pdata, src, color,
glyph_width, glyph_height,
atlas->width, base_x, base_y);