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checkkeys will now render text that is input 

Also added test functions for multi-line debug text display

Currently this only supports ASCII, as the font doesn't have the correct Latin-1 characters
This commit is contained in:
Sam Lantinga 2022-07-01 12:56:47 -07:00
parent 209f457ea4
commit e9d5060c4c
4 changed files with 346 additions and 18 deletions
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8
VisualC/tests/checkkeys/checkkeys.vcxproj
View File

@ -200,6 +200,12 @@
<CopyLocalSatelliteAssemblies>false</CopyLocalSatelliteAssemblies>
<ReferenceOutputAssembly>true</ReferenceOutputAssembly>
</ProjectReference>
<ProjectReference Include="..\..\SDLtest\SDLtest.vcxproj">
<Project>{da956fd3-e143-46f2-9fe5-c77bebc56b1a}</Project>
<Private>false</Private>
<CopyLocalSatelliteAssemblies>false</CopyLocalSatelliteAssemblies>
<ReferenceOutputAssembly>true</ReferenceOutputAssembly>
</ProjectReference>
</ItemGroup>
<ItemGroup>
<ClCompile Include="..\..\..\test\checkkeys.c">
@ -216,4 +222,4 @@
<Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
<ImportGroup Label="ExtensionTargets">
</ImportGroup>
</Project>
</Project>

93
include/SDL_test_font.h
View File

@ -38,7 +38,8 @@ extern "C" {
/* Function prototypes */
#define FONT_CHARACTER_SIZE 8
#define FONT_CHARACTER_SIZE 8
#define FONT_LINE_HEIGHT (FONT_CHARACTER_SIZE + 2)
/**
* \brief Draw a string in the currently set font.
@ -50,10 +51,12 @@ extern "C" {
*
* \returns 0 on success, -1 on failure.
*/
int SDLTest_DrawCharacter(SDL_Renderer *renderer, int x, int y, char c);
int SDLTest_DrawCharacter(SDL_Renderer *renderer, int x, int y, Uint32 c);
/**
* \brief Draw a string in the currently set font.
* \brief Draw a UTF-8 string in the currently set font.
*
* The font currently only supports characters in the Basic Latin and Latin-1 Supplement sets.
*
* \param renderer The renderer to draw on.
* \param x The X coordinate of the upper left corner of the string.
@ -64,6 +67,90 @@ int SDLTest_DrawCharacter(SDL_Renderer *renderer, int x, int y, char c);
*/
int SDLTest_DrawString(SDL_Renderer *renderer, int x, int y, const char *s);
/**
* \brief Data used for multi-line text output
*/
typedef struct SDLTest_TextWindow
{
SDL_Rect rect;
int current;
int numlines;
char **lines;
} SDLTest_TextWindow;
/**
* \brief Create a multi-line text output window
*
* \param x The X coordinate of the upper left corner of the window.
* \param y The Y coordinate of the upper left corner of the window.
* \param w The width of the window (currently ignored)
* \param h The height of the window (currently ignored)
*
* \returns the new window, or NULL on failure.
*
* \since This function is available since SDL 2.24.0
*/
SDLTest_TextWindow *SDLTest_TextWindowCreate(int x, int y, int w, int h);
/**
* \brief Display a multi-line text output window
*
* This function should be called every frame to display the text
*
* \param textwin The text output window
* \param renderer The renderer to use for display
*
* \since This function is available since SDL 2.24.0
*/
void SDLTest_TextWindowDisplay(SDLTest_TextWindow *textwin, SDL_Renderer *renderer);
/**
* \brief Add text to a multi-line text output window
*
* Adds UTF-8 text to the end of the current text. The '\n' newline character starts a
* new line of text. The '\b' backspace character deletes the last character or, if the
* line is empty, deletes the line and goes to the end of the previous line.
*
* \param textwin The text output window
* \param fmt A printf() style format string
* \param ... additional parameters matching % tokens in the `fmt` string, if any
*
* \since This function is available since SDL 2.24.0
*/
void SDLTest_TextWindowAddText(SDLTest_TextWindow *textwin, SDL_PRINTF_FORMAT_STRING const char *fmt, ...) SDL_PRINTF_VARARG_FUNC(2);
/**
* \brief Add text to a multi-line text output window
*
* Adds UTF-8 text to the end of the current text. The '\n' newline character starts a
* new line of text. The '\b' backspace character deletes the last character or, if the
* line is empty, deletes the line and goes to the end of the previous line.
*
* \param textwin The text output window
* \param text The text to add to the window
* \param len The length, in bytes, of the text to add to the window
*
* \since This function is available since SDL 2.24.0
*/
void SDLTest_TextWindowAddTextWithLength(SDLTest_TextWindow *textwin, const char *text, size_t len);
/**
* \brief Clear the text in a multi-line text output window
*
* \param textwin The text output window
*
* \since This function is available since SDL 2.24.0
*/
void SDLTest_TextWindowClear(SDLTest_TextWindow *textwin);
/**
* \brief Free the storage associated with a multi-line text output window
*
* \param textwin The text output window
*
* \since This function is available since SDL 2.24.0
*/
void SDLTest_TextWindowDestroy(SDLTest_TextWindow *textwin);
/**
* \brief Cleanup textures used by font drawing functions.

223
src/test/SDL_test_font.c
View File

@ -3120,7 +3120,7 @@ struct SDLTest_CharTextureCache {
*/
static struct SDLTest_CharTextureCache *SDLTest_CharTextureCacheList;
int SDLTest_DrawCharacter(SDL_Renderer *renderer, int x, int y, char c)
int SDLTest_DrawCharacter(SDL_Renderer *renderer, int x, int y, Uint32 c)
{
const Uint32 charWidth = FONT_CHARACTER_SIZE;
const Uint32 charHeight = FONT_CHARACTER_SIZE;
@ -3156,7 +3156,7 @@ int SDLTest_DrawCharacter(SDL_Renderer *renderer, int x, int y, char c)
drect.h = charHeight;
/* Character index in cache */
ci = (unsigned char)c;
ci = c;
/* Search for this renderer's cache */
for (cache = SDLTest_CharTextureCacheList; cache != NULL; cache = cache->next) {
@ -3242,23 +3242,234 @@ int SDLTest_DrawCharacter(SDL_Renderer *renderer, int x, int y, char c)
return (result);
}
/* Gets a unicode value from a UTF-8 encoded string
* Outputs increment to advance the string */
#define UNKNOWN_UNICODE 0xFFFD
static Uint32 UTF8_getch(const char *src, size_t srclen, int *inc)
{
const Uint8 *p = (const Uint8 *)src;
size_t left = 0;
size_t save_srclen = srclen;
SDL_bool overlong = SDL_FALSE;
SDL_bool underflow = SDL_FALSE;
Uint32 ch = UNKNOWN_UNICODE;
if (srclen == 0) {
return UNKNOWN_UNICODE;
}
if (p[0] >= 0xFC) {
if ((p[0] & 0xFE) == 0xFC) {
if (p[0] == 0xFC && (p[1] & 0xFC) == 0x80) {
overlong = SDL_TRUE;
}
ch = (Uint32) (p[0] & 0x01);
left = 5;
}
} else if (p[0] >= 0xF8) {
if ((p[0] & 0xFC) == 0xF8) {
if (p[0] == 0xF8 && (p[1] & 0xF8) == 0x80) {
overlong = SDL_TRUE;
}
ch = (Uint32) (p[0] & 0x03);
left = 4;
}
} else if (p[0] >= 0xF0) {
if ((p[0] & 0xF8) == 0xF0) {
if (p[0] == 0xF0 && (p[1] & 0xF0) == 0x80) {
overlong = SDL_TRUE;
}
ch = (Uint32) (p[0] & 0x07);
left = 3;
}
} else if (p[0] >= 0xE0) {
if ((p[0] & 0xF0) == 0xE0) {
if (p[0] == 0xE0 && (p[1] & 0xE0) == 0x80) {
overlong = SDL_TRUE;
}
ch = (Uint32) (p[0] & 0x0F);
left = 2;
}
} else if (p[0] >= 0xC0) {
if ((p[0] & 0xE0) == 0xC0) {
if ((p[0] & 0xDE) == 0xC0) {
overlong = SDL_TRUE;
}
ch = (Uint32) (p[0] & 0x1F);
left = 1;
}
} else {
if ((p[0] & 0x80) == 0x00) {
ch = (Uint32) p[0];
}
}
--srclen;
while (left > 0 && srclen > 0) {
++p;
if ((p[0] & 0xC0) != 0x80) {
ch = UNKNOWN_UNICODE;
break;
}
ch <<= 6;
ch |= (p[0] & 0x3F);
--srclen;
--left;
}
if (left > 0) {
underflow = SDL_TRUE;
}
if (overlong || underflow ||
(ch >= 0xD800 && ch <= 0xDFFF) ||
(ch == 0xFFFE || ch == 0xFFFF) || ch > 0x10FFFF) {
ch = UNKNOWN_UNICODE;
}
*inc = (int)(save_srclen - srclen);
return ch;
}
#define UTF8_IsTrailingByte(c) ((c) >= 0x80 && (c) <= 0xBF)
int SDLTest_DrawString(SDL_Renderer * renderer, int x, int y, const char *s)
{
const Uint32 charWidth = FONT_CHARACTER_SIZE;
int result = 0;
int curx = x;
int cury = y;
const char *curchar = s;
size_t len = SDL_strlen(s);
while (*curchar && !result) {
result |= SDLTest_DrawCharacter(renderer, curx, cury, *curchar);
while (len > 0 && !result) {
int advance = 0;
Uint32 ch = UTF8_getch(s, len, &advance);
if (ch < 256) {
result |= SDLTest_DrawCharacter(renderer, curx, cury, ch);
}
curx += charWidth;
curchar++;
s += advance;
len -= advance;
}
return (result);
}
SDLTest_TextWindow *SDLTest_TextWindowCreate(int x, int y, int w, int h)
{
SDLTest_TextWindow *textwin = (SDLTest_TextWindow *)SDL_malloc(sizeof(*textwin));
if ( !textwin ) {
return NULL;
}
textwin->rect.x = x;
textwin->rect.y = y;
textwin->rect.w = w;
textwin->rect.h = h;
textwin->current = 0;
textwin->numlines = (h / FONT_LINE_HEIGHT);
textwin->lines = (char **)SDL_calloc(textwin->numlines, sizeof(*textwin->lines));
if ( !textwin->lines ) {
SDL_free(textwin);
return NULL;
}
return textwin;
}
void SDLTest_TextWindowDisplay(SDLTest_TextWindow *textwin, SDL_Renderer *renderer)
{
int i, y;
for ( y = textwin->rect.y, i = 0; i < textwin->numlines; ++i, y += FONT_LINE_HEIGHT ) {
if ( textwin->lines[i] ) {
SDLTest_DrawString(renderer, textwin->rect.x, y, textwin->lines[i]);
}
}
}
void SDLTest_TextWindowAddText(SDLTest_TextWindow *textwin, const char *fmt, ...)
{
char text[1024];
va_list ap;
va_start(ap, fmt);
SDL_vsnprintf(text, sizeof(text), fmt, ap);
va_end(ap);
SDLTest_TextWindowAddTextWithLength(textwin, text, SDL_strlen(text));
}
void SDLTest_TextWindowAddTextWithLength(SDLTest_TextWindow *textwin, const char *text, size_t len)
{
size_t existing;
SDL_bool newline = SDL_FALSE;
char *line;
if ( len > 0 && text[len - 1] == '\n' ) {
--len;
newline = SDL_TRUE;
}
if ( textwin->lines[textwin->current] ) {
existing = SDL_strlen(textwin->lines[textwin->current]);
} else {
existing = 0;
}
if ( *text == '\b' ) {
if ( existing ) {
while (existing > 1 && UTF8_IsTrailingByte((Uint8)textwin->lines[textwin->current][existing - 1])) {
--existing;
}
--existing;
textwin->lines[textwin->current][existing] = '\0';
} else if (textwin->current > 0) {
SDL_free(textwin->lines[textwin->current]);
textwin->lines[textwin->current] = NULL;
--textwin->current;
}
return;
}
line = (char *)SDL_realloc(textwin->lines[textwin->current], existing + len + 1);
if ( line ) {
SDL_memcpy(&line[existing], text, len);
line[existing + len] = '\0';
textwin->lines[textwin->current] = line;
if ( newline ) {
if (textwin->current == textwin->numlines - 1) {
SDL_free(textwin->lines[0]);
SDL_memcpy(&textwin->lines[0], &textwin->lines[1], (textwin->numlines-1) * sizeof(textwin->lines[1]));
textwin->lines[textwin->current] = NULL;
} else {
++textwin->current;
}
}
}
}
void SDLTest_TextWindowClear(SDLTest_TextWindow *textwin)
{
int i;
for ( i = 0; i < textwin->numlines; ++i )
{
if ( textwin->lines[i] ) {
SDL_free(textwin->lines[i]);
textwin->lines[i] = NULL;
}
}
textwin->current = 0;
}
void SDLTest_TextWindowDestroy(SDLTest_TextWindow *textwin)
{
if ( textwin ) {
SDLTest_TextWindowClear(textwin);
SDL_free(textwin->lines);
SDL_free(textwin);
}
}
void SDLTest_CleanupTextDrawing(void)
{
unsigned int i;

40
test/checkkeys.c
View File

@ -24,8 +24,12 @@
#endif
#include "SDL.h"
#include "SDL_test_font.h"
int done;
static SDL_Window *window;
static SDL_Renderer *renderer;
static SDLTest_TextWindow *textwin;
static int done;
/* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
static void
@ -163,6 +167,18 @@ loop()
case SDL_KEYDOWN:
case SDL_KEYUP:
PrintKey(&event.key.keysym, (event.key.state == SDL_PRESSED) ? SDL_TRUE : SDL_FALSE, (event.key.repeat) ? SDL_TRUE : SDL_FALSE);
if (event.type == SDL_KEYDOWN) {
switch (event.key.keysym.sym) {
case SDLK_BACKSPACE:
SDLTest_TextWindowAddText(textwin, "\b");
break;
case SDLK_RETURN:
SDLTest_TextWindowAddText(textwin, "\n");
break;
default:
break;
}
}
break;
case SDL_TEXTEDITING:
PrintText("EDIT", event.edit.text);
@ -173,6 +189,7 @@ loop()
break;
case SDL_TEXTINPUT:
PrintText("INPUT", event.text.text);
SDLTest_TextWindowAddText(textwin, "%s", event.text.text);
break;
case SDL_FINGERDOWN:
if (SDL_IsTextInputActive()) {
@ -204,6 +221,13 @@ loop()
break;
}
}
SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);
SDL_RenderClear(renderer);
SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255);
SDLTest_TextWindowDisplay(textwin, renderer);
SDL_RenderPresent(renderer);
#ifdef __EMSCRIPTEN__
if (done) {
emscripten_cancel_main_loop();
@ -214,9 +238,6 @@ loop()
int
main(int argc, char *argv[])
{
SDL_Window *window;
SDL_Renderer *renderer;
/* Enable standard application logging */
SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
@ -242,11 +263,14 @@ main(int argc, char *argv[])
quit(2);
}
/* On wayland, no window will actually show until something has
actually been displayed.
*/
renderer = SDL_CreateRenderer(window, -1, 0);
SDL_RenderPresent(renderer);
if (!renderer) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't create renderer: %s\n",
SDL_GetError());
quit(2);
}
textwin = SDLTest_TextWindowCreate(0, 0, 640, 480);
#if __IPHONEOS__
/* Creating the context creates the view, which we need to show keyboard */